Corsair Professional HX850 850W Power Supply Review

Temperatures & Acoustical Properties

Temperatures


To be honest with you, the temperatures exhibited by the HX850 amazed us. Even when operating close to its stated maximum output, it was still able to keep temperatures under strict control. This in itself shows another benefit of high efficiency: reduced heat production.


Acoustical Properties

Considering the hellish, ear-drum shaking amount of noise that comes from our test system’s two HD 4870X2 cards and the dual Panaflo monster fans on the CoolIT Boreas, it is a miracle I haven’t gone deaf. As you can imagine, this setup isn’t the best for proper acoustical testing but by placing my ear next to the unit, I was able to get a pretty good approximation of the noise it produces.

As we mentioned above, this power supply is able to keep itself cool through increased efficiency rather than making use of a fan that spins its ass off. From what I could hear, the HX850 stays dead silent throughout its output range units we began the Max Load test. Even then the increase in fan RPMs was literally imperceptible.