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Random total power loss

Last response: in Components
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December 6, 2013 8:23:58 AM

Hi all, I'm currently experiencing total power loss on my tower randomly, at least once a day. It isn't a shut down, and there is no warning, it just dies, as though someone pulled the plug from the wall. It has run perfectly well for nearly 3 years, aside from some stability issues I had while overclocking in the very beginning (it is no longer overclocked.) Here are my specs:

Win7 Pro
Corsair 800D Full Tower
Intel i7-950 (stock clock, Noctua NH-D14 air cooler)
Asus Sabretooth X58
6GB Corsair Dominator DDR3-1333
PNY Xler8or nVidia GTX580 (Reference card, Stock Clock)
Corsair HX850 850W Modular PSU
Intel X25-M 80GB SSD (system drive)
Intel 320 160GB SSD (performance storage, e.g. games)
Seagate 1.5TB External (mass storage/back-up)
3X Scythe S-Flex 120mm internal fans (set to negative pressure)
Toshiba-Samsung 48x Supermulti optical drive

All plugged into a surge protector (no wall sockets close enough to plug into), nothing else loses power other than the tower, and I've tried multiple sockets and reseated the PSU connections inside. I don't have another PSU to test with, and I'm curious if this is likely a PSU issue or a motherboard issue.

Thanks for any help!
December 6, 2013 8:31:46 AM

Typically with a motherboard issue or heat issue, the system will shut down. Check your system logs to see if there is an indicator as to what happened. Just an educated guess - I would try another power supply first.
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December 6, 2013 8:33:12 AM

I would point my finger at the power supply most likely but as you've said you don't have another one to test with. I would go to best buy or something similar, buy another PS, and "carefully" open it and see if the issue goes away, if not you can probably return it and try a new board :p 
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January 13, 2014 11:17:16 PM

ronintexas said:
Typically with a motherboard issue or heat issue, the system will shut down. Check your system logs to see if there is an indicator as to what happened. Just an educated guess - I would try another power supply first.


Haven't been able to post because of finals and break, but now that I'm back I can update you guys. So, I checked all temps and everything was fine. I then opened the case and dusted everything really well, then reconnected all of the power connections to the mainboard. After doing this the problem stopped for about 4 weeks (part of the reason that I didn't come back.) But now the problem has started again. The maintenance I did was the first time in months that I opened the case, and as I said the problem had never existed before, but now it has recurred. I think that if it were a normal PSU or mobo issue, then cleaning and reconnecting everything wouldn't have stopped the problem, even temporarily, but I'm not sure. Do you guys still think the PSU is shot?
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