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PSU Seasonic Platinum 760: review and testing

In this review we will continue to meet with the updated lineup of high-end devices from Seasonic Platinum. At this time a detailed analysis and test will be devoted to PSU Seasonic Platinum 760 (SS-760XP2) with capacity of 760 W. Recall that the main difference between the old and the new revision is the lower cost of the last, but the main characteristics are the same. To provide the result we need to test of the solution. So let’s start from the specification of the model Seasonic Platinum760.

Seasonic Platinum 760 (SS-760XP2)


Seasonic Platinum 760

(Seasonic SS-760XP2)



Rated capacity, W


12V channel capacity, W


+3,3V and +5V channel capacity, W


Q-ty of +12V lines


Outputs, А









+5VSB (stand-by power line)



4 (6+2-pin)

Support of technologies NVIDIA SLI / AMD CrossFireX




Efficiency, %

> 91

Certified 80 PLUS


Power factor, %


Method of Power Factor balancing


Input voltage, V

100 - 240

Frequency, Hz

50 - 60

Input current, А

4,5 - 9,5

Fan dimensions, mm

120 х 120 х 25

Fan speed controller

Yes (hybrid cooling system)

Noise level, dB

Up to 30,0

Support for energy saving states C6 / C7(Intel Haswell Ready)


Correspondence to environmental standards, electromagnetic safety and compatibility (EMI/EMC)

CB, CCC, TUV, cTUVus, GOST-R, BSMI, CE, FCC, C-tick, RoHS, WEEE, ErP Lot 6 2013



Dimension, mm

160 х 150 х 86


Power cord, fastening screws, modular cables, cable holders, straps with adhesive tape, manual, logo sticker 

Warranty, years


Producer website


Product page

Seasonic Platinum 760

Packaging and content

Seasonic Platinum 760 (SS-760XP2)

Power supply Seasonic Platinum 760 is shipped in a cardboard box which provides protection against shocks and possible mechanical damages. It is made in the traditional "platinum" series style with an abundance of colorful printing.

Seasonic Platinum 760 (SS-760XP2)

As always, we were pleased by informative content of packaging. In addition to the detailed characteristics of the device, here you can also find a complete list of applied technologies and their brief description. In the course of the review we will pay special attention to each of them, and now will give a brief list:

  • Ultra High Efficiency, 80 PLUS Platinum Certified provides very high energy efficiency, which corresponds to the standard 80 PLUS Platinum;
  • DC-to-DC - advanced circuitry based on DC converters is applied;
  • Seasonic Patented DC Connector Panel with Integrated Voltage Regulation Module is a patented design of module with inverter DC-DC, which can reduce the energy loss in the low-voltage parts and improve the quality of mounting elements;
  • Tight Voltage Regulation [±2%] is a high stability of output voltages (deviations from the nominal line shall not exceed ±2%);
  • Seasonic Hybrid Silent Fan Control S2FC & S3FC is a hybrid cooling system, thanks to which the fan at low loads will not rotate;
  • Sanyo Denki San Ace Silent Fan - the use of high-quality low-speed fan, based on ball bearings;
  • All the great features of X-series and more - this power supply has all the advantages of series Seasonic X.

Sounds very impressive. Not many power supply units of the same capacity will be able to boast of such an arsenal of capabilities (solutions based on Seasonic Platinum 760 are not taken into account).

Seasonic Platinum 760 (SS-760XP2)

Supply set is rich enough and includes all the necessary components, which may require the user during operation of the device, namely:

  • AC power cord;
  • screws to secure;
  • modular cables, which are in a special two-piece handbag;
  • five cable holders and three ties to secure the wires;
  • sticker with the logo of the company;
  • manual.

Set of modular cables is not shown in the photo. We will describe it little bit latter.


Seasonic Platinum 760 (SS-760XP2)

Model Seasonic Platinum 760 is similar to its older neighbor with capacity of 860 W. External differences can be seen only in the label on the side panel. In principle, the use of the same case is a standard practice for all manufacturers, so we won’t pay a special attention to this fact. We would like to note only that the quality of its production is at a very high level: it is made of thick steel; the edges of the walls are well proceed, and the panels are fit tightly to each other. Dimensions of Seasonic Platinum 760 are   160 x 150 x 86 mm, which is quite typical for modular solutions of similar capacity.

Seasonic Platinum 760 (SS-760XP2)

This model uses the familiar layout of the vents. They can be found only on the cover and the front wall, while the other panels are continuous. Manufacturer refused to use the traditional "gril", replacing it with a mesh in comb. According to the employees of Sea Sonic Electronics, this design should better affect the airflow resistance.

Seasonic Platinum 760 (SS-760XP2)

Having analyzing the configuration of the rear panel, first of all pay attention to the fully modular cables. It allows to make the process of connecting components and cabling simple and convenient, especially if we are talking about some kind of multi-functional building. All connectors are signed and have a different design, so there should be no difficulty. But just in case we will specify the purpose of each of them:

  • 18-pin and 10-pin («M/B») - to power the motherboard;
  • five 6 -pin («Peripheral IDE/SATA») - to supply periphery;
  • six 8-pin («CPU/PCI-E») - for additional power of processor and graphics card.

The number and location of modular connectors for Seasonic Platinum 760 and Seasonic Platinum 860 is identical, due to the use of some universal nodes in both devices. This approach can significantly reduce the final cost of the power supply.

But let’s back to the hero of our review. As it belongs to the top-end series Seasonic Platinum, it is logical that it combines all the most advanced development of company dealing with the cooling system. In this case it is a hybrid in nature.

Seasonic Platinum 760 (SS-760XP2)

The above diagram provides better understanding of its operation In comparison with a conventional hybrid cooling system it is characterized by that before reaching a certain temperature the fan does not rotate, and then the rotation speed is determined by heating the blades and the load level of components. That is, at low loads (in this case up to 30% (± 5%) of the nominal value) Seasonic Platinum 760 runs completely silently. Although we have repeatedly seen that this threshold is relative: in case of more or less well-organized air circulation inside the computer case it can be shifted even to the level of 50% of the declared capacity.

If the power supply is operated in an environment of high temperature, the hybrid mode can be turned off (set the toggle switch in position «Normal»). In this case, the fan Seasonic Platinum 760 begins to rotate immediately after starting the PC, that is, even at minimum load. In other words, the user can select the mode of operation of the cooling system, depending on the operating conditions.

Seasonic Platinum 760 (SS-760XP2)

Detachable cables are made in the form of strips that positively affects their usability. Main power connectors have the following configuration: folding 20+4-pin ATX and two 8-pin ATX12V (one of which is also folding). That is the model Seasonic Platinum 760 is suitable for dual-processor systems, and even for overclocking experiments.

Graphics card power is realized in four 6 + 2-pin PCIe, which allows to connect the two simultaneous high-level graphics cards without the use of third-party adapters. Note that all PCIe connectors are on separate cables.

Seasonic Platinum 760 (SS-760XP2)

Also the number and configuration of cables for connecting peripherals are at high level. Available connectors are enough to create a desktop based on a small file server or torrent client, as well as to power the fans and other devices within the body.

Socket type


Cable length to socket (connectors), cm

Modular (detachable) cables

20+4-pin power socket ATX



4+4-pin power socket ATX12V



8-pin power socket ATX12V



6+2-pin power socket PCIe



three PATA sockets



two PATA sockets



tour SATA sockets



two SATA sockets



adapter PATA-FDD



Seasonic Platinum 760 (SS-760XP2)

Now let's take a closer look at the technical characteristics of the power supply. Its nominal power is 760 W. Channel +12V is formed as a single line with a loading capacity of up to 63 A. In other words, if necessary, it is possible to remove 99.5% of the total capacity, which is quite relevant for modern components. In addition, the field to experiment with their overclocking is significantly expanded. Lines +3.3V and +5V have a maximum total power of 125 W and are designed for a load of 25 A each.

As you might guess from the title, in terms of energy efficiency Seasonic Platinum 760 complies with 80 PLUS Platinum. This is also indicated by the picture on the label. Power supplies are standardized according to 80 PLUS Platinum if their efficiency for 230V at loads of 20%, 50% and 100% does not fall below 90%, 94% and 91%, respectively.
Also do note a wide input voltage range (100 - 240), which eliminates the external voltage regulators in an unstable power supply.

Internal device 

Seasonic Platinum 760 (SS-760XP2)

The process of dismantling the power supply Seasonic Platinum 760 is standard: you need just unscrew the screws securing the top cover. We draw your attention to the presence of a special sticker with the inscription «Warranty void if removed».

To cool internal components is used 120 mm 7-blade fan SANYO DENKI 9S1212F404. It has an excellent ratio of performance to noise. In addition, the use of a rolling bearing and improved methods of balancing allow to speak about its high reliability and long service life. This fan is installed in a more powerful power supply units (in particular, the same Seasonic Platinum 860), so it will easily cope with the task.



Bearing type


Supply voltage, V


Current, A


Capacity, W


Maximum rotation speed, rpm


Air flow, CFM


Noise level, dB

Up to 30,0

Dimensions, mm

120 х 120 х 25

In order to optimize air flow within the housing here is small transparent plastic plate attached to the fan.

Seasonic Platinum 760 (SS-760XP2)

At the heart of the new revision of PSU Seasonic Platinum 760 is the same platform as the previous version - Seasonic KM3. This is not surprising. After all, with the corresponding circuitry it can easily provide the highest level of performance and the desired characteristics of the output. So there was no sense to modify it cardinally.

Seasonic Platinum 760 (SS-760XP2)

Seasonic Platinum 760 (SS-760XP2)

Let's start the analysis of the internal power supply unit with a high-voltage part. Behind the power outlet is a part of EMI-filter (chock, X- and two Y-capacitor), which is hidden behind the screen. The remaining components (varistor, two chokes, two X two and Y-capacitors) are arranged directly at the main PCB. Recall that the purpose of this site is to smooth high frequency noise emitted by the power supply into the network. Also it bears the function of lightning protection. We really liked the approach the manufacturer to isolate individual elements, not only as a part of the filter, but also in other structural power supply module.

Due to the tight layout we could determine the characteristics of the bridge for rectifying the input voltage. However, taking into account the presence of two diode arrays and the fact that the company Sea Sonic Electronics always picks up elements with a large margin of safety, you won’t have any surprises working with Seasonic Platinum 760 at extreme loads. Especially it has a separate aluminum radiator is quite impressive size.

Seasonic Platinum 760 (SS-760XP2)

The engineers have worked with other power cooling elements at the same good level. But don’t forget that to a certain load Seasonic Platinum 760 can operate with inactive fan so fast heat removal is one of the most important tasks in this case.

Seasonic Platinum 760 (SS-760XP2)

After studied in detail the internal structure of the power supply, we did not find any part with low quality. Thus, absolutely all nodes use only Japanese capacitors from high temperature series (105°C), including a high voltage circuit. And, again, the elements are selected with a fairly large margin - 420 V x 330 uF. Taking into account that these capacitors are connected in parallel, we obtain the total capacity of the node at the level of 660 uF which is an excellent result for the 760-W device. Their producer is a well-known company Nippon Chemi-Con, whose products are considered to be the reference.

Seasonic Platinum 760 (SS-760XP2)

ear is the active unit power correction factor (APFC). Its power unit is represented by two field-effect transistors Infineon 6R199P and Schottky diode ROHM SCS106AG.

Seasonic Platinum 760 (SS-760XP2)

The model Seasonic Platinum 760 uses a resonant converter with a full bridge. Its keys are the four transistors Infineon 5R250P that operate in pairs under the control of the PWM controller CM6901.

Seasonic Platinum 760 (SS-760XP2)

As we noted at the beginning of the review, the low-voltage part is the synchronous rectifier with DC-DC-converters. Unfortunately, the nominal elements involved in the formation of the + 12V was not be established. They are completely closed by a large U-shaped heatsink.

Seasonic Platinum 760 (SS-760XP2)

Via a layer of thermally conductive material the radiator contacts with the casing cover of power supply, turning it into a kind of heat diffuser.

Seasonic Platinum 760 (SS-760XP2)

Converters of remaining voltages are wired on a separate board. The formation of lines + 3.3V and + 5V is provided by six transistors Infineon BSC0906NS (three for each channel). Their heating during operation is so small (on-state resistance of only 4.5 milliohms), that the blowing by preinstalled is enough. Control of DC-DC-converters is on the shoulders of the PWM controller APW7159.

Seasonic Platinum 760 (SS-760XP2)

On the reverse side of the card are part of the modular connectors and other components of the converters: two coils and filtering polymer capacitors (470 uF x 16 V and 560 uF x 6.3 V). This configuration of a low voltage has several advantages. Firstly, here is a space on the main PCB. Secondly, the energy losses and noise on the power supply outputs are minimized. And thirdly, element installation is simplified, which entails increasing overall product quality.

Seasonic Platinum 760 (SS-760XP2)

Since the channel +12V is more loaded compared to other lines, and then filtering is provided by more capacitors. In this case they are shown as solid elements (470 uF x 16 V), and liquid electrolyte (2200 uF x 16 V). As mentioned above, they all have Japanese base, and hence the excellent quality.

Seasonic Platinum 760 (SS-760XP2)

According to the technical specifications, model Seasonic Platinum 760 has an entire row of protection (OVP / UVP / OPP / SCP / OCP / OTP), including protection against overload and overheating. The node is based on chip-supervisor Weltrend WT7527V.

Seasonic Platinum 760 (SS-760XP2)

As always, the quality of the soldering dose nor arise complaints. All paths are smooth and stains or other defects were found. In this regard the products of Sea Sonic Electronics can be considered as a reference. And the each new test confirms these words.

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