Under the Hood

Corsair Professional Series Gold AX850 PSU Review - Cases and Cooling 38

Here are a few pictures showing the layout and components inside the Corsair AX850 power supply.  The overall layout looks excellent with components neatly organized and excellent soldering on the PCBs.  Corsair is once again using Seasonic as the OEM for the AX850, which appears to be based on Seasonic’s popular X-Series. 

Corsair Professional Series Gold AX850 PSU Review - Cases and Cooling 39

One of the key design features of the Seasonic X-Series that is incorporated into the AX850 is the two DC-to-DC converters used to generate the +3.3V and +5V outputs, are located on the modular cable connector board.  This eliminates some of the internal distribution wiring that could produce voltage drops under high loads, which results in lower losses and higher efficiency compared to traditional designs that have the VRMs on the main PCB.

Corsair Professional Series Gold AX850 PSU Review - Cases and Cooling 40
(Courtesy of Corsair)

A pair of Nippon Chemi-Con electrolytic capacitors are used on the primary, both rated for 390 uF, 400V, and 105°C.  The secondary features mostly solid polymer caps also made by Nippon Chemi-Con – very nice. 

Corsair Professional Series Gold AX850 PSU Review - Cases and Cooling 41

Corsair Professional Series Gold AX850 PSU Review - Cases and Cooling 42


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