Corsair CS850M Power Supply Review

The Corsair CS850M power supply is cooled by the Ong Hua HA1425L12F-Z fan.

Interesting to see Corsair are using a larger 140mm fan in this newer 850 watt unit – rated to spin at a maximum of 1,800rpm. The older CS650M which we reviewed incorporated the 120mm HA1225L12S-Z. There is a partial clear cover across the fan to direct the air specifically across the heatsinks.

It would appear that Great Wall are the OEM partner for this unit. The build quality is quite good, although we have seen better. There are only a few heatsinks inside, but if the 80 Plus Gold Efficiency is accurate they should be fine, especially with a large 140mm fan overhead.

The Diode bridge handles AC/DC rectification of the incoming AC voltage. Soldering quality on the main PCB is acceptable although there are some rough traces visible.



The Corsair CS850M uses two high grade Japanese grade Rubycon primary capacitors both of which are rated 400V, 390uF. They are not the higher grade 105c rated capacitors from the company, but are still better than Chinese counterparts. Secondary capacitors are primarily TEAPO branded, clearly to save some costs.

All cables are protected against the metal chassis by a rubber grommet and then tied into place.

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