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25-03-2015


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BIOS setting manual

Since there are a lot of questions to BIOS and its settings, we decided to write a reference book that will contain the knowledge about this popular theme. At the time it is relatively small, though has incorporated a lot of interesting data. In the future we plan to periodically extend this material to competely cover all occurring in the BIOS options.

To facilitate the search for the description of the settings you are interested, we have arranged them all in alphabetical order. You can also use search functions over the document (in most browsers key combination Ctrl+F opens the window "Search").

Please note that some options may have quite a lot of customization options caused by a class of motherboard, chipset, manufacturer and types of supported devices. Therefore, as an example we will give the most current at the time the description of the option.

Manual structure:

-          BIOS setting in alphabetical order;

-          What is BIOS?

-          How to enter the BIOS?

 


 

[0-9 A B C D E F G H I J K L M N O P R S T U V W X Y Z]

1-Core Ratio Limit - sets a limit multiplier value of the first processor core in turbo mode.

  • [Auto] – defines the standard value;
  • [8]..[Max] – the value is set manually and it must be greater or equal the multiplier in parameter 2-Core Ratio Limit.

2-Core Ratio Limit - sets a limit multiplier value of the second processor core in turbo mode. This option becomes active only after selecting [Per Core] in parameter CPU Core Ratio.

 [Auto] [manual setting of the value]

  • [Auto] – defines the standard value;
  • [8]..[Max] – the value is set manually and it must be greater or equal the multiplier in parameter 3-Core Ratio Limit. The option 1-Core Ratio Limit should not have the value [Auto]

3-Core Ratio Limit - sets a limit multiplier value of the third processor core in turbo mode. This option becomes active only after selecting [Per Core] in parameter CPU Core Ratio.

  • [Auto] – defines the standard value;
  • [8]..[Max] – the value is set manually and it must be greater or equal the multiplier in parameter 4-Core Ratio Limit. The options 1-Core Ratio Limit / 2-Core Ratio Limit should not have the value [Auto].

3.3V Voltage – displays a current value of supply voltage (W) in line +3.3V.

[xxxx V]

4-Core Ratio Limit - sets a limit multiplier value of the fourth processor core in turbo mode. This option becomes active only after selecting [Per Core] in parameter CPU Core Ratio.

[Auto] [manual setting of the value]

  • [Auto] – defines the standard value;
  • [8]..[Max] – the value is set manually and options 1-Core Ratio Limit / 2-Core Ratio Limit / 3-Core Ratio Limitshould not have the value [Auto]

5V Voltage - displays a current value of supply voltage (W) in line +5V.

[xxxx V]

12V Voltage − displays a current value of supply voltage (W) in line +12V.

[xxxxx V]

1st Boot Device - first boot device
[xxx Drive] [Disabled]
Specified device in this paragraph will be the first from which the BIOS will try to load the operating system.

2nd Boot Device - second boot device
[xxx Drive] [Disabled]
Specified device in this paragraph will be the second from which the BIOS will try to load the operating system.

32Bit Data Transfer - 32 bit data transfer mode
[Disabled] [Enabled]
During operation of hard drives IDE or others operating in compatibility mode, 32-bit mode optimizes data exchange via bus PCI. If you disable it, it became possible to slightly reduce the performance of the disk subsystem, especially in the case of connecting two IDE-devices on one cable, so it's best to put an option in the state Enabled.

3rd Boot Device - third boot device
[xxx Drive] [Disabled]
Specified device in this paragraph will be the third from which the BIOS will try to load the operating system.

3.3V Voltage, 5V Voltage, 12V Voltage – reveals the voltage on lines +3.3 V, +5 V and +12 V in monitoring section.

A

ACPI 2.0 Support - support of ACPI 2.0
[Disabled] [Enabled]
“Enabled” option activates the support of power control interface ACPI (Advanced Configuration and Power Interface) of 2.0 specifications which supports 64-bit operating systems and is backward compatible with the version of ACPI 1.0b.

ACPI APIC Support is a support of ACPI APIC
[Disabled] [Enabled] 
“Enabled” option activates the support of Advanced Configuration and Power Interface (ACPI) of advanced programmable interrupt controller (APIC). This gives the opportunity to work with multiprocessor systems and systems with a single processor multi-core architecture or supporting the technology Hyper-Threading. In order to make the operating system more correct to use the capabilities of multi-core processor, before the installation you need to enable this option (for example, Windows XP will automatically install the core ACPI Multiprocessor PC).

ACPI Suspend Type – operation suspend mode
[S1 (POS)] [S3 (STR)]
This section sets the duration of  PC sleep mode:
S1 (POS) - in this mode, the sleep state is determined by the transition of the system into a low power consumption of all components, but you can quickly return it to normal;
S3 (STR) - in this mode the contents of RAM is stored on permanent memory and virtually all PC components are stopped, allowing it to be more economical than in mode S1 (POS), but a return to a working state this mode takes more time.

Active Memory Threshold - lets you manually set the size required for the correct operation of technology Intel Rapid Start Technology. Use the parameter [0] points the system to determine the required size automatically. If you manually enter a value to make sure that it was more than the amount of RAM.

Active Page Threshold Support - allows (value [Enabled]) / forbids (value [Disabled]) the system automatically set the size required for the correct operation of technology Intel Rapid Start Technology. Setting “Enabled” also provides access to options Active Memory Threshold, where required size can be set manually.

[Disabled] [Enabled]

Active to Precharge (Tras, tRAS) - minimum activity time of row
When reading data from memory it defines the minimum time between the activation of the row (RAS #) and the start of the closing row or a precharge command (tRP #).

Additional Turbo Mode CPU Cache Voltage - allows you to manually set the maximum value of the supply voltage in the adaptive (dynamic) mode on the ring bus (Uncore/Cache) of the processor. The search algorithm of the optimal value is the same as in the description of the options Additional Turbo Mode CPU Core Voltage.  This setting is available only when the option CPU Cache Voltage has selected parameter [Adaptive Mode].  

[Auto] [0.001V] - [Max]   

Additional Turbo Mode CPU Core Voltage - allows you to manually set the maximum value of the supply voltage in the adaptive (dynamic) mode, which is supplied to the CPU cores. For correct operation of the adaptive power control mode first you need to find in the manual mode the voltage at which the system with an overclocked CPU operates stably under maximum load (parameter [Manual Mode] in the option CPU Core Voltage). Then you need to set the received voltage in the option Additional Turbo Mode CPU Core Voltage, and in setting CPU Core Voltage Offset select Additional Turbo Mode CPU Core Voltage. This setting is available only when the option CPU Cache Voltage has selected parameter [Adaptive Mode].  

[Auto] [0.001V] - [Max]             

Additional Turbo Mode CPU Graphics Voltage allows you to manually set the maximum value of the supply voltage in the adaptive (dynamic) mode on integrated graphics core. The search algorithm of the optimal value is the same as in the description of the options Additional Turbo Mode CPU Core Voltage.  This setting is available only when the option CPU Cache Voltage has selected parameter [Adaptive Mode].  

[Auto] [0.001V] - [Max]   

Adjacent Cache Line Prefetch allows you to control the unit of hardware prefetch of data rows from RAM. During operation processor tries to predict the required data to perform operations and loads from RAM not one 64-byte row but two adjacent with total length of 128 bytes. As there is a high probability that the second line would be necessary for further operations of computation units, it makes sense to enable this option (value [Enabled]). Its activation can positively affect the performance of CPU.

[Disabled] [Enabled]

Administrator Password is a submenu with options to control the administrator's password. It allows you to have full access (view and edit) to all settings of BIOS.

Advanced Menu is a menu that includes the items for control the configuration and proprietary technologies implemented in a processor, chipset, system agent and other system components.

Agere Firewire 1394 - Controller IEEE 1394a.
[Disabled] [Enabled]
“Enabled” option enables and disables the integrated controller Disabled IEEE 1394a (FireWire) on a chip Agere. The disable of unused controller can free system resources for other devices.

Aggressive LPM Support - forbids (parameter [Disabled]) / permits (parameter [Enabled]) transition of drives and controller SATA ports to power-saving mode. In case of frequently refer to the drive and a small amount of RAM it is recommended to disable this feature. Setting is available only when the option SATA Mode Selection is set in parameter [AHCI].

[Auto] [Disabled] [Enabled]

AI Overclocking
[Manual] [Auto] [Standard] [N.O.S.]
Setup (on motherboards ASUS) allows you to specify the type of configuration parameters of the system related to overclocking. “Manual” option corresponds to the user mode where you can set parameters of the system responsible for the overclocking. “Auto” corresponds to the automatic configuration of the system, “Standard” to the standard parameters form, “N.O.S.” activates the proprietary technology ASUS N.O.S. of dynamic overclocking.

Ai Overclock Tuner - an option that allows you to make automatic overclocking of components (CPU, RAM, BCLK, and others.) on motherboards from ASUS.

[Auto] [Manual] [X.M.P.]

  • [Auto] - loads the standard settings for the system;
  • [Manual] - optimizes the CPU multiplier (CPU Ratio) and the reference clock (BCLK Frequency);
  • [XMP] - optimizes the CPU multiplier (CPU Ratio), the reference clock (BCLK Frequency) and the speed of the RAM, and if the SPD memory modules has XMP-profiles, the motherboard will load the most optimal one.

Ai Tweaker menu - menu in the BIOS of ASUS motherboard, which contains the settings for overclocking and optimization of the individual components of the system.

All Processor Cores - allows you to select the number of active cores. Setting the parameter [All] activates all available processor cores.

[All] [1] [2] [3] 

AMT Configuration is a sub-menu, which includes options for controlling the parameters of the technology Intel Active Management Technology (and remote-band access via a network connection to the resources of the system, including the BIOS, regardless of its state).

Anti Surge Support is a technology, which on ASUS motherboards provides protection from high voltage in the main power lines (+3.3V, +5V and +12V). We strongly recommend to activate this option because it allows you to prevent failure of PC components in case of failure of power supply unit or its incorrect operation.

[Disabled] [Enabled]

APM is a submenu where are settings for power control system using the devices connected to it.

Append db from File (in submenu DB Management) downloads additional db database file (more detail description is the item DB Management) from the connected USB-drive, thus increasing the list of applications that can be safely loaded during PC launch. 

Append DBX from File (in submenu DBX Management) downloads additional db database file (more detail description is the item DBX Management) from the connected USB-drive, thus increasing the list of applications that did not pass control or are undesirable for loading during PC launch.  

Append KEK from File (in submenu KEK Management) downloads additional key Key−Exchange Key (more detail description is the item KEK Management) from the connected USB-drive for additional database db and dbx that contains signatures for required/objectionable system pre loaders and UEFI compatible drives. At the same time the file that contains key  Key−Exchange Key should be formatted in a proper way.

ASPM Support - an option that lets you control the energy-saving technology of bus DMI/PCIe. Controllers of chipset and devices connected to it (via PCI Express slots) should always operate synchronously. Therefore, even in the absence of flow data, they send the detection signals which are interpreted as empty and ignore it. With this option, you can prevent the transmission of signals in the empty one or both sides, thereby saving electricity when there is no flow of data between the processor and chipset. However, it takes some time to synchronize.

[Disabled] [Auto] [L0s] [L1] [L0sL1]

  • [Disabled] - both controllers are always active and handing of empty signals continues even in the absence of the data stream.
  • [Auto] - sets a value by default.
  • [L0s] - in the absence of flow the empty signal data transfer is realized in one direction, with the result that it takes less time to synchronize the controllers at their exit from power-saving mode.
  • [L1] in the absence of flow the empty signal data transfer is stopped in both directions without the state «L0s». As a result, more energy saving compared with the state of «L0s», but also more time to synchronize the controllers at their exit from power-saving mode is required.
  • [L0sL1] - allows both states. First, switch to the mode «L0s», and then - in the «L1».

ASUS C.G.I. Function - technology ASUS C.G.I.

“Enabled” option activates the technology ASUS CGI (Cross Graphics Impeller), which is designed to accelerate the graphics system in mode CrossFire.

ASUS MultiCore Enhacement - sets the maximum multiplier for all cores during the operation in turbo mode, regardless of how many cores are involved in a particular moment. Enabling of this feature allows to slightly increase the performance of the processor at high load, but at the same time you will get the increase of heat. It is recommended to use in frequent work in multithreaded applications or while running multiple programs at serious overclocking of CPU, as well as to achieve maximum results in the synthetic tests.

[Enabled] [Disabled]

B

BCLK Frequency: allows you to set the measure between the reference frequency and the speed of the RAM. For system stability it is recommended to use the values [Auto] or [100:100]. However in some cases at extreme overclocking to achieve maximum results in applications that are dependent on the speed of RAM, can be useful other measures.

[Auto] [100:100] [100:133]

  • [Auto] - defines the optimal value for the memory speed;
  • [100:100] - the ratio of the reference frequency to the speed of the RAM is equal to 1:1;
  • [100:133] - the ratio of the reference frequency to the speed of the RAM is equal to 1:1.33.

Syn.: CPU bus speed : DRAM speed ratio mode.

BIOS EHCI Hand-off - Disable of interface EHCI
[Disabled] [Enabled]
“Enabled” option disables the support of enhanced interface of host controller USB 2.0 EHCI (Enhanced Host Controller Interface). EHCI interface is fully compatible with standard USB 1.1 and 2.0 and is intended to reduce the involvement of the processor in the controller USB.

BIOS Hotkey Pressed - allows you to disable (setting [Disabled]) / allow (option [Enabled]) remote access to the BIOS settings using technology Intel Active Management Technology. This setting is available only if the Intel AMT has the paarmeter [Enabled].

[Disabled] [Enabled]

Block (Multi-Sector Transfer)
[Disabled] [Auto]
During setting the operation modes of SATA-controller the option “Disabled” allows you turn off transfer mode of data blocks if it is not supported by your hard drive. The block addressing allows read several sectors per one time, which certainly speeds up the process of data exchange.

Boot Devices Control allows you to specify the type of devices from which you can boot the operating system. Changing the settings is available only if the option Launch CSM has the value [Enabled].

  • [UEFI and Legacy OpROM] - Support for all types of devices and controllers, including outdated.
  • [Legacy OpROM only] - support for only out of date devices and controllers. When using this value you may face with problem regarding installing and running modern operating systems, as well as lack of access to modes RAID and AHCI.
  • [UEFI only] - support only modern UEFI-compatible devices and controllers. This value can be selected when installing operating systems of the Windows family of 7/8/10 or other versions that require mandatory use of mode UEFI.

Boot Performance Mode - This option determines the performance of the processor, at which the operating system is booted. To save power during this process you should set the value [Max Battery].

[Max Non-Turbo Performance] [Max Battery] [Turbo Performance]

Boot from Network Devices allows you to specify the type and priority of network devices from which you can boot the operating system. Changing the settings is available only if the option Launch CSM has value [Enabled].

  • [Legacy OpROM first] - loading is done with older devices without the support of the mode UEFI.
  • [UEFI driver first] - loading is done with modern UEFI-compatible devices.
  • [Ignore] - a ban on starting the operating system from network devices. Selecting this value makes impossible the operation of technology PXE.

Boot from PCIe/PCI Expansion Devices allows you to specify the type and priority of devices connected via slots PCI Express or PCI, where you can boot the operating system. Changing the settings is available only if the option Launch CSM has value [Enabled].

  • [Legacy OpROM first] - loading is done with older devices without the support of the mode UEFI.
  • [UEFI driver first] - loading is done with modern UEFI-compatible devices.

Boot from Storage Devices allows you to specify the type and priority of external storage devices from which you can boot the operating system. Changing the settings is available only if the option Launch CSM has value [Enabled].

  • [Both, Legacy OpROM first] - Support for all types of devices and controllers, but priority is given to loading of obsolete solutions inconsistent with the mode UEFI.
  • [Both, UEFI first] - Support for all types of devices and controllers, but priority is given to modern UEFI-compliant solutions.
  • [Legacy OpROM first] - loading is done with older devices without the support of the mode UEFI.
  • [UEFI driver first] - loading is done with modern UEFI-compatible devices.
  • [Ignore] - ban to load the operating system from external storage devices.

Boot Logo Display using this option, you can specify whether the on-screen will display manufacturer's logo and a series of motherboard during the passage of procedure POST-test.

Boot Logo Size Control allows you to specify the size of the logo that will be displayed on the screen during the passage of procedure POST-test. Changing the settings is available only if the option Boot Logo Display has value [Enabled].

  • [Auto] – logo is placed in the center of the screen and has the dimensions specified by the manufacturer of the motherboard.
  • [Full Screen] – logo is scaled to the entire area of the screen.

Boot Menu This menu contains settings to configure the boot process of the computer and operating system. 

Bootup NumLock State determines the activity status of the button [NumLock], that is, the availability of digital unit keypad during PC boot.

  • [On] − [NumLock] is active.
  • [Off] − [NumLock] is inactive.

Boot Option Priorities allows you to set the priority and order of devices from which you want to load the operating system. The number and name of the device is automatically detected by the system after the launch of the PC. If the list of available options does not contain connected drive, this indicates about improper connection or improper operation.

Boot Override allows to determine the device from where the forced load of the operating system will be realized.

C

C1E Support - Technology C1E
[Disabled] [Enabled]
It is used to control the technology «C1E Support», which allows disabling processor units during system inactivity to reduce power consumption. “Enabled” option enables the technology.

C6 Latency - determines the length of the latency before the transition of the processor into state C6 of the previous mode.
[Short] [Long]
• [Short] - a short latency;
• [Long] - a long latency.

C7 Latency - determines the length of the latency before the transition of the processor into state C7 of the previous mode.
[Short] [Long]
• [Short] - a short latency;
• [Long] - a long latency.

CAS # Latency (tCL) - CAS Latency
[3] [4] [5] [6]
Setting determines the latency (timing) of memory CAS (Column Address Strobe) determining the number of cycles (time) between receiving the command to read and beginning to read data directly from the chip DRAM.

Change Settings (from the submenu Serial Port Configuration) - option using which you can set to  COM interface one of the available addresses of I/O ports, as well as the interrupt number. This setting is available only if the item Serial Port has parametr [Enabled].
[IO = 3F8h; IRQ = 4] [IO = 2F8h; IRQ = 3] [IO = 3E8h; IRQ = 4] [IO = 2E8h; IRQ = 3]

Channel A DIMM Control - controls the availability of the RAM slots of channel "A".

[Enable Both DIMMS] [Disable DIMM0] [Disable DIMM1] [Disable Both DIMMS]

  • [Enable Both DIMMS] - enables both RAM slots of channel «A»;
  • [Disable DIMM0] - disables the first RAM slot (the one that is the closest to the processor socket) of channel "A";
  • [Disable DIMM1] - disables the second RAM slot of channel "A";
  • [Disable Both DIMMS] - disables both RAM slots of channel «A».

Channel B DIMM Control - controls the availability of the RAM slots of channel «B».
[Enable Both DIMMS] [Disable DIMM0] [Disable DIMM1] [Disable Both DIMMS]

  • [Enable Both DIMMS] - enables both RAM slots of channel «B»;  
  • [Disable DIMM0] - disables the first RAM slot (the one that is the closest to the processor socket) of channel «B»;
  • [Disable DIMM1] - disables the second RAM slot of channel «B»;
  • [Disable Both DIMMS] - disables both RAM slots of channel «B».

Chassis 1 Max. Duty Cycle (%) allows you to set the upper limit of the corresponding fan speeds (a percentage of the maximum number of rotation). This value is used for the correct operation of technology ASUS Chassis Q-Fan in Mode [Manual]. More details about the principle of its operation, you can find in the description of option 1 Chassis Fan Profile. Selection of required item is carried by pressing the buttons [+] or [-] on the keyboard in increments of 1%. Note that the value Chassis 1 Fan Max. Duty Cycle (%) must be higher than Chassis 1 Fan Min. Duty Cycle (%).

[60]...[100]

Chassis 1 Fan Min. Duty Cycle (%) allows you to set the bottom limit of the corresponding fan speeds (a percentage of the maximum number of rotation). This value is used for the correct operation of technology ASUS Chassis Q-Fan in Mode [Manual]. More details about the principle of its operation, you can find in the description of option 1 Chassis Fan Profile. Selection of required item is carried by pressing the buttons [+] or [-] on the keyboard in increments of 1%. Note that the value Chassis 1 Fan Max. Duty Cycle (%) must be lower than Chassis 1 Fan Min. Duty Cycle (%).

Chassis 1 Fan Profile option using which you can select one of the predefined profiles or set fan operation connected to socket «CHA_FAN1» on the motherboard (the exact name of the connector you can find in the diagram in the manual). This setting is available only if option Chassis 1 Q−Fan Control is set to [Enabled].

  • [Standard] - the system automatically adjusts the rotation speed of the corresponding fan depending on the temperature of the chipset.
  • [Silent] - sets the minimum rotation speed of the corresponding fan.
  • [Turbo] - sets the maximum rotation speed of the corresponding fan.  
  • [Manual] - provides access to the options for fine-tuning schemes of the respective fan. Firstly it determines the range of acceptable temperatures for the chipset, where the lower bound is fixed and displayed in the area Chassis 1 Lower Temperature, and the top is defined by the option Chassis 1 Upper Temperature. Then, in the same way it determines the range of fan rotation speed. The difference lies only in the fact that two limits are not fixed and set manually. To set the lower bound, you need to use setting Chassis 1 Fan Min. Duty Cycle (%), and the upper - Chassis 1 Fan Max. Duty Cycle (%). As a result the technology ASUS Chassis Q−Fan in mode [Manual] is as follows: in the interval Chassis 1 Lower Temperature Chassis 1 Upper Temperature fan speed will vary linearly within Chassis 1 Fan Min. Duty Cycle (%)Chassis 1 Fan Max. Duty Cycle (%) and will not leave regardless of the temperature of the chipset.

Chassis 1 Fan Speed Low Limit allows the system to automatically check the integrity of the fan connected to the sockets «CHA_FAN1» on the motherboard (the exact name of the connector is the diagram in the manual). For correct operation of this feature you need use the available options to set a minimum threshold of rotation speed of the fan. If during PC boot amount of fan rotations is below a predetermined value, you will have the message in the form of the phrase «System Fan Failure» (or equivalent in meaning) and further loading the PC will be stopped. To disable this option, you must use the item [Ignore]. This setting is available only if option Chassis 1 Q−Fan Control is set to [Enabled].

Chassis 1 Lower Temperature displays the lower limit of the allowable temperature range (Celsius) for the chipset. This value is used for the correct operation of technology ASUS Chassis Q-Fan Mode [Manual]. More details about the principle of its operation see the description of options Chassis 1 Fan Profile. In most cases, the value of Chassis 1 Lower Temperature is fixed at the level of BIOS firmware and can not be changed.

Chassis 1 Q−Fan Control is an option that allows you can turn on (the [Enabled]) or off (value [Disabled]) technology for automatic speed control of fan, connected to «CHA_FAN1» on the motherboard (the exact name of the connector see the diagram User's Guide), depending on the temperature of the chipset (ASUS Chassis Q-Fan). Since the temperature of chipset is not always objective value of heating the air in the system or individual body parts, it is necessary to pay special attention to careful tuning of circuit in a current function. Otherwise, you can not achieve the desired effect of additional fans, and only increase the overall level of generated noise.

Chassis 1 Upper Temperature allows you to set the upper limit of allowable temperature (Celsius) for the chipset. This value is used for the correct operation of technology ASUS Chassis Q-Fan in mode [Manual]. More details about the principle of its operation you can find in the description of options Chassis 1 Fan Profile. Selection of an item is carried by pressing the [+] or [-] on the keyboard in steps of 1°C. Note that the value Chassis 1 Upper Temperature should be higher than Chassis 1 Lower Temperature.

Chassis 2 Max. Duty Cycle (%) is the same as the Chassis 1 Max. Duty Cycle (%). Only we are talking about the fan connected to the «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual).

Chassis 2 Min. Duty Cycle (%) is the same as the Chassis 1 Min. Duty Cycle (%). Only we are talking about the fan connected to the «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual).

Chassis 2 Fan Profile is the same as Chassis 1 Fan Profile. Only we are talking about the fan connected to the «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual).

Chassis 2 Fan Speed Low Limit is the same as Chassis 1 Fan Speed Low Limit. Only we are talking about automatic health check fan connected to «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual).

Chassis 2 Lower Temperature is the same as Chassis 1 Lower Temperature. Only we are talking about the fan connected to the «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual). 

Chassis 2 Q−Fan Control is the same as Chassis 1 Q−Fan Control. Only we are talking about the use of technology ASUS Chassis Q-Fan to the fan connected to the «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual).

Chassis 2 Upper Temperature - the same as Chassis 1 Upper Temperature. Only we are talking about the fan connected to the «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual).

Chassis Fan 1 Speed displays the current fan speed (revolutions per minute or RPM), connected to «CHA_FAN1» on the motherboard (the exact name of the connector you can see the diagram in the manual). If the fan is not connected, the value is [N/A]. If you do not want to see this index, select [Ignore].

Chassis Fan 2 Speed is the same as the Chassis Fan 1 Speed. Only we are talking about the current speed of the fan connected to the «CHA_FAN2» on the motherboard (the exact name of the connector you can see the diagram in the manual).

Clear Secure Boot keys (menu Secure Boot) removes all the standard keys of technology Secure Boot. Function is available only if the option OS Type (menu Secure Boot) is set to [Windows UEFI mode].

CPU Core Voltage displays the current value of the supply voltage (volts), which is supplied to the CPU core.

CPU Fan Max. Duty Cycle (%) allows you to set the upper limit of the range of fan speeds (percentage of the maximum number of revolutions) on the CPU cooler. This value is used for the correct operation of technology ASUS CPU Q-Fan in mode [Manual]. More details about the principle of its operation you can see the description of the options CPU Fan Profile. Selection of an item is carried by pressing the [+] or [-] on the keyboard in increments of 1%. Note that the value of the CPU Fan Max. Duty Cycle (%) must be greater than the CPU Fan Min. Duty Cycle (%).

CPU Fan Min. Duty Cycle (%) allows you to set the lower limit of the range of fan speeds (percentage of the maximum number of revolutions) on the CPU cooler. This value is used for the correct operation of technology ASUS CPU Q-Fan in mode [Manual]. More details about the principle of its operation you can see the description of the options CPU Fan Profile. Selection of an item is carried by pressing the [+] or [-] on the keyboard in increments of 1%. Note that the value of the CPU Fan Min. Duty Cycle (%) must be lower than the CPU Fan Max. Duty Cycle (%).

CPU Fan Profile is an option, which allows selecting one of the predefined profiles or setting the operating mode of the fan on the CPU cooler. This setting is available only if the option CPU Q−Fan Control is set to [Enabled].

  • [Standard] - the system automatically adjusts the fan speed according to the CPU temperature.
  • [Silent] - sets the minimum fan rotation speed on the CPU cooler.
  • [Turbo] - sets the maximum rotation speed of the fan on the CPU cooler.
  • [Manual] - provides access to the options for fine-tuning circuit of the fan on the CPU cooler. Firstly it determines the range of acceptable temperatures for the processor, where the lower bound is fixed and displayed in the CPU Lower Temperature, and the top is set with the option CPU Upper Temperature. Then in the same way you can define a range of speeds of the fan on the CPU cooler. The difference lies only in the fact that two limits are not fixed and set manually. To set the lower bound, you must use the setting CPU Fan Min. Duty Cycle (%), and the upper - CPU Fan Max. Duty Cycle (%). As a result the technology ASUS Chassis Q−Fan in mode [Manual] is as follows: in the interval CPU Lower Temperature CPU Upper Temperature fan speed will vary linearly within CPU Fan Min. Duty Cycle (%)CPU Fan Max. Duty Cycle (%)  and will not leave regardless of the temperature of the chipset.  

CPU Fan Speed displays the current fan speed (revolutions per minute or RPM) for CPU cooler. If the fan is not connected to the motherboard, the output value is the [N/A]. If you do not want to see this index, select [Ignore]. If you do not want to use this connector (for example, when the cooling of the processor by means of water cooling system), is also worth a set [Ignore]. Otherwise, when passing POST-checking the computer will constantly remind you that the fan on the CPU cooler is not connected, and require pressing the appropriate key on the keyboard to boot the system.

CPU Fan Speed Low Limit allows the system to automatically check the integrity of the fan on the CPU cooler. For correct operation of this feature you need use the available options to set a minimum threshold of rotation speed of the fan. If during boot the number of revolutions of the fan on the CPU cooler is below the set point, the screen will automatically display the message in the form of the phrase «CPU Fan Error» and further loading the PC will be stopped. To disable this option you must use the [Ignore]. Setting CPU Fan Speed Low Limit is available only if the option CPU Q−Fan Control is set to [Enabled].

CPU Input Voltage (VCCIN) displays the current value of the input voltage (volts) of the processor.

CPU Lower Temperature displays the lower limit of the acceptable range of temperatures (Celsius) for the processor. This value is used for the correct operation of technology ASUS CPU Q-Fan in mode [Manual]. More details about the principle of its operation you can see the description of the options CPU Fan Profile.

CPU Q−Fan Control is the option, which allows you to enable (value [Enabled]) or off (value [Disabled]) technology for automatically controls the fan speed according to the CPU temperature (ASUS CPU Q-Fan). We recommend to activate this feature because it allows to achieve significant reduction in noise from the CPU cooler, especially in cases when the CPU goes to a small load.

CPU Upper Temperature allows you to set the upper limit of allowable temperature (Celsius) for the processor. This value is used for the correct operation of technology ASUS CPU Q-Fan in mode [Manual]. More details about the principle of its operation you can see the description of the option CPU Fan Profile. Selection of an item is carried by pressing the [+] or [-] on the keyboard in steps of 1°C. Note that the value of the CPU Upper Temperature e should be higher than the CPU Lower Temperature. 

CSM (Compatibility Support Module) submenu, which contains settings for controlling compatible technology of UEFI- devices with outdated equipment and modules from third-party manufacturers.

Chassis 1 Speed [xxxRPM] - rotation speed of case fans
[Ignore] [N/A]
This menu item provides the monitoring of rotation speed of case fans rpm. This function can be turned off if you set the option Ignore.

Chasis Fan Ratio - Definition of minimum speed of case fans
The setup «Chasis Fan Ratio» has percentage determination of minimum rotation speed of case fans, the value of which in the regulation of speed control function Chasis Q-fan Control will meet the minimum temperature of the processor specified in the setting «Chassis Target Temperature». Almost minimum speed is determined by the value of the minimum voltage specified in the fan housing and is calculated taking into account the fact that at a supply voltage of 12 V speed reaches 100%.

Chasis Q-fan Control - function ASUS Q-fan to control case fan rotation speed
[Disabled] [Enabled]
Setup «Chasis Q-fan Control» is used to activate the automatic control of case fan rotation speed, which allows you to reduce the noise of the system unit.

Chassis Target Temperature - parameter of settings Chasis Q-fan Control
[28ºC], [31ºC], [34ºC], [37ºC], [40ºC], [42ºC], [46ºC]
Setting is necessary to determine the temperatures of the CPU, in which the function of automatic control of speed case fans ASUS Q-fan will set the minimum speed. This setting is necessary to configure the parameters of the controller.

C.I.A.2 - CPU Intelligent Accelerator 2
[Disabled] [Cruise] [Sports] [Racing] [Turbo] [Full Thrust]
Dynamic overclocking technology from GIGABYTE, which at detection of the CPU load increases the frequency of the system bus and the processor to a certain level depending on the mode selected:
Cruise - overclocking by 5 to 7%;
Sports - overclocking by 7 or 9%;
Racing - overclocking by  9 or 11%;
Turbo - overclocking by 15 or 17%;
Full Thrust - overclocking by 17 or 19%.
Clock Over-Charging Mode

Setting is necessary to improve the stability of the FSB bus opearting at higher frequencies. The higher the frequency, the higher is recommended to choose the value in setting Clock Over-Charging Mode, but keep in mind that this will increase the heating of north bridge on chipset.

Clock Over-Charging Mode

[Auto] [700mV] [800mV] [900mV] [1000mV]
Setting is necessary to improve the stability of the FSB bus operating at higher frequencies. The higher frequency, the higher is value in setting Clock Over-Charging Mode, but keep in mind that this will increase the heating of the north bridge of the chipset.

Configure SATA as - Select the interface for SATA devices
[IDE] [RAID] [AHCI]
Controller Serial ATA supports multiple modes of operation. The first is the emulation mode of the parallel interface of data transfer ATA conventional IDE devices, it is necessary for compatibility. The second mode allows you to create RAID arrays. The third mode is actually native to the Serial ATA protocol AHCI (Advanced Host Controller Interface), which includes functions to optimize the hard disk, such as NCQ (Native Command Queuing), Hot Swap, Port Multiplier, Staggered Spin-Up, which allow increase the data rate, reduce noise of the hard dick and implement other empower disk subsystem functions.

Controller Mode - Selects the operating mode of the SATA controller
[RAID] [IDE] [AHCI]
Using «Controller Mode» you can define the operation of an additional controller. This option allows you to create RAID SATA RAID arrays, option IDE determines the controller in emulation of IDE devices. AHCI option configures the SATA ports to work via AHCI (Advanced Host Controller Interface), which includes functions to optimize the hard disk, such as NCQ (Native Command Queuing), Hot Swap, Port Multiplier, Staggered Spin-Up.

Command Rate - Decoding Time
[1T] [2T] [3T]
Syns.: CR, Command Per Clock, CMD
It sets the required for the memory controller to decode the address and command. Sometimes it is described more simply - the time between the start of the implementation of the two tasks. Setting affects the performance of the memory subsystem - the lower the latency, the better. But the possibility of its successful change highly depends on the number and architecture of the installed memory modules.

CPU Analog I / O Voltage Offset - allows you to manually set the value (offset-parameter), on which will have increased/decreased rated voltage of CPU Analog I/O (directly related to the integrated memory controller). It is recommended to increase with a significant overclocking of RAM.

[Auto] [0.001V] - [Max]

CPU Analog I / O Voltage Offset Mode Sign - allows you to set the sign of the value offset-parameter for option CPU Analog I/O Voltage Offset, that is, to determine the increase or decrease of the supply voltage of CPU Analog I/O (directly related to the integrated memory controller ) by a value specified by using offset-parameter.

[+] [-]

CPU Audio Device - allows you to enable (setting [Enabled]) / disable (setting [Disabled]) sound core built into the processor Intel.

[Disabled] [Enabled]

CPU bus speed: DRAM speed ratio mode - see the description of option BCLK Frequency: DRAM frequency ratio mode.
Syns.: BCLK Frequency: DRAM frequency ratio mode.

CPU C States - allows you to control energy-saving state of processor at low loads or at its transition to the idle mode. To obtain full access to the settings of these states, you should select parameter [Enabled]. To achieve the maximum overclocking, all its power-saving modes are recommended to disable.

CPU C3 Report - allows you to disable (setting [Disabled]) / allow (option [Enabled]) the transition to energy-saving state C3 (when the frequency drops to 0 MHz, L1 and L2cache memory is disabled, but at the same time the values of all registers are saved) . In this mode the CPU operates with very low supply voltage, which is only required for the storage of data from registers.
[Disabled] [Enabled]

CPU C6 Report - allows you to disable (setting [Disabled]) / allow (option [Enabled]) the transition to energy-saving state C6 (when in C3 state the values are written to permanent memory). In this mode the CPU operates with very low supply voltage. The minimum load on the +12V line can be lowered to 0.5 A, so the power supply must support this feature (defined in the specification ATX12V 2.3).
[Disabled] [Enabled]

CPU C7 Report - allows you to disable (parameter [Disabled]) / allow (options [CPU C7] and [CPU C7s]) the transition to energy-saving processor state C7 (advanced state of C6 which consumes even less power). As opposed to the mode C6 in state C7 the load on the line +12V is significantly lower and can reach 0.05 A. Not all power supplies can provide such indicator that lead to their disconnection or the system is rebooted due to protection OVP / UVP line +12V. If you have this problem, you should turn off (parameter [Disabled]) this option.
[Disabled] [CPU C7] [CPU C7s]

CPU Cache Voltage - allows you to select the setting mode of voltage on the ring bus (Uncore / Cache).

[Auto] [Manual Mode] [Offset Mode] [Adaptive Mode]

  • [Auto] - sets a value by default;
  • [Manual Mode] is a mode in which the exact value of the supply voltage is entered manually.
  • [Offset Mode] is a mode in which the exact value of the supply voltage is set manually using the offset-parameter (the amount by which nominal voltage will be increased/decreased).
  • [Adaptive Mode] is a mode in which the power supply voltage is set manually using the offset-parameter and/or options Additional Turbo Mode CPU Cache Voltage. However, it can dynamically change depending on the CPU frequency, frequency of ring bus (Uncore/Cache) and the nature of the current load on the CPU to improve the stability of the system and reduce energy consumption. This mode is often used for a permanent job with the overclocked processor, after you have been selected the optimal settings by using the [Manual Mode]. Note that the option [Adaptive Mode] is not available for all models of processors.

CPU Cache Voltage Offset - allows you to manually set the value (offset-parameter), on which the nominal voltage on the ring bus (Uncore / Cache) will be increased/decreased (depending on the options selected in the Offset Mode Sign). Option [Auto] corresponds to the value "0". This option is available only when CPU Cache Voltage has parameter [Offset Mode] or [Adaptive Mode].

[Auto] [0.001V] - [Max]   

CPU Cache Voltage Override - allows you to manually set the exact value of the supply voltage on the ring bus (Uncore/Cache). This option is available only when CPU Cache Voltage has parameter [Manual Mode].

[Auto] [0.001V] - [Max]  

CPU Configuration is a sub-menu, which contains the configuration of the processor, as well as options to control proprietary technologies.
CPU Core Voltage - allows you to select the setting mode of voltage that is applied to the processor core.

[Auto] [Manual Mode] [Offset Mode] [Adaptive Mode]

  • [Auto] - sets a value on default.
  • [Manual Mode] is a mode in which the exact value of the supply voltage is entered manually.
  • [Offset Mode] is a mode in which the exact value of the supply voltage is set manually using the offset-parameter.
  • [Adaptive Mode] is a mode in which the power supply voltage is set manually using the offset-parameter and/or options Additional Turbo Mode CPU Core Voltage. Thus it can be dynamically changed depending on the processor speed and the nature of the load current to it to improve the stability of the system and reduce power consumption. This mode is often used for a permanent job with the overclocked processor, after you have been selected the optimal settings by using the [Manual Mode]. Note that the option [Adaptive Mode] is not available for all models of processors.

CPU Core Voltage Offset allows you to manually set the value (offset-parameter), by which rated voltage on processor cores will be increased/decreased (depending on the options selected in the Offset Mode Sign). Option [Auto] corresponds to the value "0". This option is available only when CPU Core Voltage has parameter [Offset Mode] or [Adaptive Mode].

[Auto] [0.001V] - [Max]  

CPU Core Voltage Override allows you to manually set the exact value of the supply voltage (V), which is supplied to the CPU core. This option is available only when CPU Core Voltage has parameter [Manual Mode].

[Auto] [0.001V] - [Max]  

CPU Core Ratio allows you to control the mutlipliers of processor cores.

[Auto] [Sync All Cores] [Per Core]

  • [Auto] – sets standard values for the multipliers of processor cores;
  • [Sync All Cores] - allows you to manually set the same multiplier for all processor cores;
  • [Per Core] - allows you to set the multiplier for each processor core individually.

CPU Current Capability allows to increase the maximum power supplied to the processor. In other words it extends the range of the current consumed by the processor at a specific voltage. A higher percentage value will avoid a situation where the motherboard will limit overclocking due to the fact that the actual CPU power consumption will be higher than the value set by the manufacturer.

[Auto] [100%] [110%] [120%] [130%] [140%]

CPU Digital I / O Voltage Offset allows you to manually set the value (offset-parameter), on which rated voltage CPU Digital I / O will be increased/decreased (depending on the chosen option CPU Digital I/O Voltage Offset Mode Sign). It is recommended to increase during a significant overclocking of RAM.

[Auto] [0.001V] - [Max] 

CPU Digital I / O Voltage Offset Mode Sign - allows you to set the sign of the value offset-parameter for option CPU Digital I / O Voltage Offset, that is, to determine the increase or decrease of the supply voltage of CPU Digital I/O (directly related to the integrated memory controller ) by a value specified by using offset-parameter.

[+] [-]

CPU EIST Function – support of frequency control function

[Disabled] [Enabled]

This option enables the Enhanced Intel SpeedStep Technology, which allows to reduce CPU speed and voltage supply, which leads to lower power consumption and reduces heat dissipation.

CPU Enhanced Halt (C1E) – support of extended idle mode

[Disabled] [Enabled]
The option is used to enable enhanced features energy saving processor in idle mode (C1E), when in order to save not only automatically reduced frequency and voltage, but some blocks can be switched off.

CPU Fan Profile - profile of function ASUS Q-fan
[Optimal], [Silent Mode] [Performance Mode]

Using the profile for the automatic regulation of the rotational speed of the CPU cooler ASUS Q-fan, you can select the appropriate intensity regulation. That is, select a profile Performance Mode with sufficiently high cooling efficiency of the cooler, but the relatively high level of noise, or choose a quiet, but less efficient mode Silent Mode. Middle profile between a productive and quiet mode is Optimal.

CPU Fan Speed [xxxRPM] - rotation speed of the CPU cooler
[Ignore] [N / A]
This menu item is used to monitor the rotational speed of the CPU cooler rpm. This feature can be turned off if you set the option Ignore.

 
CPU Fixed Frequency (KHz) - sets the operating frequency for the voltage inverter. The higher it is, the more stable is the supply output voltage. However, increasing the switching frequency of transistors leads to additional heating of the components of the module VRM.

[200kHz]..[Max]

CPU Graphics Max. Ratio - see the description of option Max. CPU Graphics Ratio.

Syns: Max. CPU Graphics Ratio.
CPU Graphics Voltage - allows you to select the setting mode of voltage on the built-in graphics core.
[Auto] [Manual Mode] [Offset Mode] [Adaptive Mode]

  • [Auto] - sets a value by default.
  • [Manual Mode] is a mode in which the exact value of the supply voltage is entered manually.
  • [Offset Mode] is a mode in which the exact value of the supply voltage is set manually using the offset-parameter.
  • [Adaptive Mode] is a mode in which the power supply voltage is set manually using the offset-parameter and/or options Additional Turbo Mode CPU Graphics Voltage. Thus it can be dynamically changed depending on the nature and intensity of the load on the graphics core, as well as the current frequency of the iGPU to improve system stability and reduce power consumption. This mode is often used for a permanent job with the overclocked graphics core, after you have been selected the optimal settings by using the [Manual Mode]. Note that the option [Adaptive Mode] is not available for all models of processors.

CPU Graphics Voltage Offset - allows you to manually set the value (offset-parameter), on which rated voltage of the built-in graphics core will be increased/decreased (depending on the options selected in the Offset Mode Sign). Option [Auto] corresponds to the value "0". This option is available only when CPU Graphics Voltage has a parameter [Offset Mode] or [Adaptive Mode].

[Auto] [0.001V] - [Max]  

CPU Graphics Voltage Override - allows you to manually set the exact value of the supply voltage integrated graphics core. This option is available only when CPU Graphics Voltage has a parameter [Manual Mode].

[Auto] [0.001V] - [Max]  

CPU Host Frequency (MHz) - reference frequency of processor
Synonyms: CPU FSB Clock, FSB Frequency, External Clock
Manual setting of the reference clock (or system bus frequency), which by means of multipliers and dividers synchronizes clock speeds of the remaining components of the system. In normal operation the PC often is in the Auto mode. Value CPU Host Frequency changes only during overclocking of the processor and/or other components. But you should remember that the increase of operating frequencies for chips leads to an increase in their energy consumption and heat dissipation.

CPU Input Voltage (VCCIN) - allows you to manually specify the exact value of the input voltage of the processor.


[Auto] [0.800V] .. [Max]

CPU Integrated VR Current Limit - allows you to set the maximum current (A) flowing through the built-in in processors Intel Haswell power regulator (FIVR) at high loads. Sets the maximum value removes the restriction that will be useful during extreme overclocking.

[Auto] [0.125A] .. [1023.875A]

CPU Integrated VR Efficiency Management - is responsible for the performance of integrated in processors Intel Haswell power regulator (FIVR) during CPU idle. During overclocking of the CPU it is recommended to use the value [High Performance].

[Auto] [High Performance] [Balanced]

  • [Auto] - set the value on default;
  • [High Performance] - a built-in power regulator (FIVR) running at peak performance all the time, regardless of the load on the processor;
  • [Balanced] - performance of power supply controller (FIVR) during CPU idle time is reduced, thereby overall power consumption CPU is slightly reduced.

CPU Integrated VR Fault Management - allows you to control a protection mechanism of supply regulator (FIVR) at high loads. We have no information about the nature of the action of this algorithm, as well as indicators for which it is run. We can only say that it is not a major step to protect CPU. In the case of manual increase of voltage it is recommended to disable this option. The same opinion is shared by the specialists of ASUS.

[Auto] [Disabled] [Enabled]

CPU Internal Power Configuration is submenu where settings responsible for the energy efficiency of the power regulator (FIVR) are grouped.

CPU Internal Power Fault Control is a submenu that opens access to the settings mechanisms for the protection of the external module VRM and the built-in power regulator (FIVR). It is active only when Turbo Mode parameter is set to [Enabled].

CPU Internal Power Saving Control is a submenu where settings to control power-saving technologies of built power regulator (FIVR) are grouped.

CPU Internal Power Switching Frequency is a submenu that opens access to the settings of built supply regulator (FIVR). It is active only when Turbo Mode parameter is set to [Enabled].

CPU Multi-Threading - support of multi-core processors

[Enable] [Disable]
Allows enable or disable multi-threaded computing for multi-core processors. In fact, when you select the option Disable all processor cores in addition to the first physical are disabled. Using a multi-core processor or a processor with support of technology Hyper-Threading the option must always be Enable.

CPU PLL Voltage – Voltage of PLL
[Auto] [1.50V] [1.60V] [1.70V] [1.80V]
Setting «CPU PLL Voltage» determines the supply voltage of phase-locked loop and is relevant only to improve the stability of overclocked quad-core processors. In most cases, the very minimum parameter is enough or use the parameter Auto.

CPU Power Duty Control - indicates the parameter to monitor the load on each phase of CPU power converter.
[T.Probe] [Extreme]

  • [T.Probe] - heating elements power phases is accounted. This value is more secure and minimizes the risk of the failure of module VRM.
  • [Extreme] - current supply is taken into account, and the information from the temperature sensor is ignored. This parameter is used to achieve maximum performance during overclocking, and organize the reliable cooling of the components of the power converter CPU.

CPU Power Management is a submenu that includes settings for controlling the processor cores and energy-saving technologies that are implemented on the CPU.

CPU Power Management Configuration is a submenu where settings to control CPU states under loads of different types are grouped.

CPU Power Phase Control - control the number of active power phases depending on CPU load. For everyday work it is recommended to use the values [Auto] or [Optimized]. In the mode [Extreme] CPU power converter will have the extreme operation, which will lead to unnecessary heating if elements due to the low load on the processor.

[Auto] [Standard] [Optimized] [Extreme] [Manual Adjustment]

  • [Auto] - loads the standard settings for the active phases specified by the manufacturer for a specific processor model.
  • [Standard] - the same as the option [Auto].
  • [Optimized] - sets the settings of phases activity.
  • [Extreme] - makes all phases active, regardless of the load on the processor.
  • [Manual Adjustment] - manual adjustment of the rate switching phases of the load on the processor. This option is appropriate to be used during CPU overclocking by setting [Ultra Fast].

CPU Q-fan Control – function ASUS Q-fan
[Disabled] [Enabled]
“Enabled” option activates the function of automatic speed control CPU cooler ASUS Q-fan, which is designed to reduce the noise from the fan by changing the rotation speed depending on the CPU temperature.

CPU Spread Spectrum – activation of this option changes the shape of the signal on the system bus (BCLK), thereby reducing the level of electromagnetic radiation and interference from the system components. However, due to this frequency reference is also slightly reduced the (in standard mode instead of 100 MHz, it’s dropped to 99.3 - 99.5 MHz), when overclocking can lead to system instability and will not achieve maximum results. During optimization the system parameters this option is recommended to be disabled (value [Disable]).

[Auto] [Disabled] [Enabled]

CPU System Agent Voltage Offset - allows you to manually set the value (offset-parameter), on which the nominal voltage on the system agent will be increased/decreased (depending on the options selected in the CPU System Agent Voltage Offset Mode Sign). Power supply to the system agent is the voltage on the memory controller. Thus, during overclocking of memory modules to a high speed voltage should be increased.

[Auto] [0.001V] - [Max]  

CPU System Agent Voltage Offset Mode Sign - allows you to set the sign of the value offset-parameter for option CPU System Agent Voltage Offset, that is, to determine increase or decrease the supply voltage on the system agent by the amount specified using the offset-parameter.

[+] [-]

CPU Temperature [xxx°C/xxx°F] - displays the CPU temperature in the monitoring section of the system.


CPU TM Function (Thermal Monitor 2, TM2) - The protective function of Intel processors against overheating
[Disabled] [Enabled]
Setting «CPU TM Function» is responsible for the function Thermal Monitor CPU overheating protection. When the critical temperature of the CPU is reached the mechanism Thermal Monitor produces a range of measures, such as the reduce of the clock frequency, reducing the clock frequency and operating voltage of up to shutdown the PC, which prevent system failure.

CPU Voltage - The voltage at the processor core
[Auto] ... [1.1V] ... [1.7V] ...
Setting «CPU Voltage» defines core voltage. For normal operation leave the option Auto, and for overclocking mode the voltage can be increased, but be sure to take into account the conditions of cooling, because the increase in core voltage directly affects heat release.

CPU Voltage Damper - function that reduces voltage drop on the CPU
[Auto] [Disabled] [Enabled]
Function CPU Voltage Damper reduces sagging voltages on the CPU, which can occur at increased loading. Enable option activates this function.

CPU Voltage Reference – mode of power supply to the processor
[Auto] [0.63x] [0.61x] [0.59x] [0.57x]
Setting that determines the mode of the power supply to the CPU. For better stability of the overclocked system you should select option 0.63x, and for normal operation it is recommend to leave Auto.
Create New Password sets the new password to access the settings of BIOS. The rights of access depend on the password level (Administrator/User).

D

DB Management (menu Secure Boot) is a submenu, which contains the option to configure the database db (Authorised Signature Database). It contains the signature and hash images of all UEFI-compliant applications, system preloaders and UEFI-drivers that can run on a PC. DB Management is available only if the option OS Type (menu Secure Boot) is set to [Windows UEFI mode].

DBX Management (menu Secure Boot) is a submenu, which contains the option to configure the database dbx (Revoked Signature Database). It contains the signature and hash images of all UEFI-compliant applications, preloaders and UEFI-drivers that have not been tested or are a potential threat to the system. DBX Management section is available only if the option OS Type (menu Secure Boot) is set to [Windows UEFI mode].

DDR OverVoltage Control - voltage excess on the memory
[+ 0.05V] ... [+ 1.55V]
Synonyms: DDR2 OverVoltage Control, DDR3 OverVoltage Control
This seup allows you to increase the operating voltage of the memory modules by the value of the current, which may be necessary to overclock the RAM or start overclocking modules in their nominal mode. You should consider several factors:  - An increase in voltage leads to an increase in the heating, which can cause "death" of memory, especially if they have no additional cooling; - Rising of voltage with respect to the standard for the type of memory (DDR - 2,5 In, DDR2 - 1,8 In, DDR3 - 1,5 V);  - some motherboards initially have overestimated operating voltage of the memory modules on the 0.05-0.15 V, which also must be considered.

Deep S4 - sllows (value [Enabled]) / disabled (value [Disabled]) transfer PC to sleep mode «S4» (absolutely all settings are written to the drive and there is the most complete de-energization of the system components). In this mode the PC can be re-started only by pressing the «POWER» on the system unit or via the signal applied to LAN-interface. The system does not react when buttons are pressed on the keyboard or mouse movement (regardless of their type of connection - USB or PS/2).

[Disabled] [Enabled]

Delete PK (submenu PK Management) removes the Platform Key (more detail about its purpose, read the item description PK Management). After this procedure, all other keys of technology Secure Boot become inactive.

Delete the db (submenu DB Management) removes the file database db (more details of its mission, read the description of the item DB Management) from the system.

Delete the DBX (submenu DBX Management) deletes a database file dbx (more details of its mission, read the item description DBX Management) from the system.

Delete the KEK (submenu KEK Management) removes the Key-Exchange Key (more detail about its purpose read the item description KEK Management) from the system.

DMA Mode – choice of the mode DMA setup to work with storage devices
[Auto] [SWDMA0] [SWDMA1] [SWDMA2] [MWDMA0] [SWDMA1] [SWDMA2] [UDMA0] [UDMA1] [UDMA2] [UDMA3] [UDMA4] [UDMA5]
Option allows you to select the appropriate mode DMA, which supports the device.
The dependence of the capacity of the selected DMA mode is shown in the table below:

 

DMA mode

Max transmission rate, MB/s

Specification

Single word

 

 

0

2,08

ATA

1

4,16

ATA

2

8,33

ATA

Multi word

 

 

0

4,12

ATA

1

13,3

ATA-2

2

16,6

ATA-2

Ultra DMA

 

 

0

33,3

Ultra ATA

1

66,7

Ultra ATA

2

100

Ultra ATA

3

133

Ultra ATA

4

150

Serial ATA I

5

300

Serial ATA II

DMI Configuration is a sub-menu, which includes control options of bus DMI parameters (high-speed data bus between the processor and chipset).

DMI Gen 2 - allows you to specify the type of DMI bus, and accordingly, the maximum data transfer rate between the processor and chipset: 1.0 (up to 2 GB/s) or 2.0 (up to 4 GB/s). We recommend to choose the second option (DMI 2.0).

[Auto] [Disabled] [Enabled]

  • [Auto] - the system automatically sets the standard of DMI bus;
  • [Disabled] - DMI bus operates in mode 1.0 with a capacity of up to 2 GB/s;
  • [Enabled] - DMI bus operates in mode 2.0 with a capacity of up to 4 GB/s.

DMI Link ASPM Control (menu PCH Configuration) is an option which can be used to resolve (value [Enabled]) / disable (value [Disabled]) the use of energy-saving technology of bus DMI/PCIe on chipset side. It is recommended to disable it during overclocking the system components, because the synchronization bus controllers DMI/PCIe takes time. To fine-tune the technology use the option ASPM Support.

[Auto] [Disabled] [Enabled]

DMI Link ASPM Control (menu System Agent Configuration) is an option that allows you control the energy-saving technology of DMI bus on the side of the system agent. Its operation is the same as in the case with the chipset (see the description of the setting DMI Link ASPM Control in menu PCH Configuration).

[Disabled] [Auto] [L0s] [L1] [L0sL1]

  • [Disabled] - both controllers are always active and handing of empty signals continues even in the absence of the data stream.
  • [Auto] - sets value by default.
  • [L0s] - in the absence of flow the empty signal data transfer is realized in one direction, with the result that it takes less time to synchronize the controllers at their exit from power-saving mode.
  • [L1] in the absence of flow the empty signal data transfer is stopped in both directions without the state «L0s». As a result, more energy saving compared with the state of «L0s», but also more time to synchronize the controllers at their exit from power-saving mode is required.
  • [L0sL1] - allows both states. First, switch to the mode «L0s», and then - in the «L1».

DRAM CLK Period - allows you to set the delay of the memory controller in combination with a fixed frequency of memory. Setting of lower values (see [5], [6], [7]) can increase overall system performance, but it may have a negative impact on the stability of its work.

[Auto] [1]..[14]

DRAM CTRL REF Voltage - allows you to set the signal supply voltage for all memory channels in the exchange of data between the processor and memory. In other words, it is a kind of a pointer, in which the memory controller determines that compliance of sent signal by the value of "0" or "1". All the supply voltages are below the value defined in the option DRAM CTRL REF Voltage and will be interpreted as "0", and above – as a "1". It is given in the form factor with respect to the supply voltage to the memory modules (DRAM Voltage). The default it is [0,500h]. In normal overclocking of system components it is recommended to use the option [Auto]. Manually configure this option makes sense only in case of maximum overclocking using extreme cooling when level of ripple and interference distorts the input/output signal.

[Auto] [0.3950x] .. [0.6300x]

DRAM DATA REF Voltage on CHA - allows you to set the signal voltage for the memory channel «A» at the exchange of data between the processor and memory modules installed in the slots of the channel «A». Algorithm to get the correct values, as well as the use of the settings are the same as in the description of the options DRAM CTRL REF Voltage.

[Auto] [0.3950x] .. [0.6300x]

DRAM DATA REF Voltage on CHB - allows you to set the signal voltage for the memory channel «B» at the exchange of data between the processor and memory modules installed in the slots of the channel «B». Algorithm to get the correct values, as well as the use of the settings are the same as in the description of the options DRAM CTRL REF Voltage.

[Auto] [0.3950x] .. [0.6300x]

DRAM Frequency - allows you to set the frequency of RAM. The list of values depends on the capacity of the memory modules and the parameter BCLK Frequency: DRAM frequency ratio mode (CPU bus speed: DRAM speed ratio mode). Installation of too much frequency can lead to instability of the whole system. Parameter [Auto] loads the settings of the memory speed.

Syns: Memory Frequency.

DRAM Static Read Control - Function of memory acceleration
[Auto] [Disabled] [Enabled]
“Enabled” option activates acceleration function of the memory subsystem.

DRAM Timing Control (Timing Selectable) is a method for determining memory timings
[Auto] [Manual]
“Manual” option activates the custom timings (delays) of RAM.

DRAM Voltage - allows you manually set the exact value of the supply voltage to the memory modules.
[Auto] [1.185V] .. [Max]


DVI Port Audio – allows (value [Enabled]) / disabled (value [Disabled]) the use of built-in sound core to output signal via port DVI. Setting is available only when the option CPU Audio Device is set to [Enabled].

[Disabled] [Enabled]

 

E

EHCI Hand-off - forbids (setting [Disabled]) / allows (parameter [Enabled]) use of the mechanism EHCI Hand-off at the hardware level. It is designed for correct operation of controller EHCI (responsible for interface USB 2.0) in the case of simultaneous access to it several USB-devices. This option should be activated if the mechanism EHCI Hand-off is not implemented at the operating system (for example, its support appeared in the OS family MS Windows only since version MS Windows XP SP2). 
[Disabled] [Enabled]

  • [Disabled] - allows the use of a hardware implementation of the mechanism EHCI Hand-off.
  • [Enabled] - forbids the use of a hardware implementation of the mechanism EHCI Hand-off.

Enhanced C1 State - allows you to disable (setting [Disabled]) / allow (option [Enabled]) the transition of CPU to energy-saving state (when in case of load absence the multiplier and the frequency are reduced to the minimum specified by the manufacturer, but the other components of the processor and interfaces continue to work). In this mode, the CPU does not perform operations, and operates at a reduced voltage. But if required it can immediately return to its basic operational status.

[Disabled] [Enabled]

Enhanced Intel SpeedStep Technology - controls the firm power-saving function. Its essence lies in the fact that at low load or CPU idle mode it will automatically reduce the frequency and voltage, thereby reducing their energy consumption. It has several intermediate operating states which allow optimal balance between performance and power consumption of the processor.

[Disabled] [Enabled]

Enter Current Password - the option to enter an existing password for access to your BIOS. The vastness of the rights of access depends on the password level (Administrator / User).


Entry after - allows you to specify the number of minutes after which the computer goes to sleep mode «S4» (absolutely all settings are written to the drive and there is the most complete de-energization of the system components). It means that function Intel Rapid Start Technology is activated.

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