Power surges with Corsair HX850w?

AntiElephantMine

Honorable
Aug 25, 2013
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10,530
Here are my specs:

CPU: Intel i7-4770k
GPU: Sapphire Radeon 7990
MB: Gigabyte Z87X-UD3H
RAM: Corsair 2x4gb DDR3 1600Mhz
PSU: Corsair HX series 850w atx PSU
HDD: Seagate 1TB Barracuda Internal Hard Drive (64mb cache, 7200rpm)
A 256GB SSD (I admit I forget what make)
OS: Windows 7 64-bit professional
Optical: Samsung 24x Sata Internal DVD±RW

Yesterday, while playing maxed out BF3, three times I had an issue where my computer randomly shut off, like there had been a power cut. Pressing the power button did absolutely nothing, but I unplugged and replugged the power cable and then it was fine (it could turn back on). I have had my build for over a year now and this is the first occurrence of this issue I've had.

I opened up my case, all fans are working and everything is plugged in fine - it is also relatively clean. Before the third shut down I looked at my GPU temps and was getting 85/74 degrees (while playing BF3) which is pretty normal. I have no issues while idling.

So my immediate thought it my PSU is playing up. I could see nothing visibly wrong with it. Before I claimed warranty or bought another PSU, I wanted to make sure this was definitely the case. Although I couldn't find many results from google, someone told me the HX 850 is also infamous for being one of the worst units Corsair ever made/sold. Unfortunately I don't have a spare PSU lying around that I can try in the meantime.
 
Solution
http://pcsupport.about.com/od/insidethepc/a/power-supply-voltage-tolerance.htm

Power Supply Voltage Tolerances
Proper Voltage Ranges for ATX Power Supply Voltage Rails


http://www.cpuid.com/softwares/hwmonitor.html
HWMonitor.


Can this be right? None of my voltages seem to be within the tolerance levels;

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