PC shuts down automatically

October 2, 2011 at 12:14:22
Specs: Windows 7, 3.2 GHz / 4 gigs
Hey guys,

So it happened to me when I played Civ5 that my computer just completely turned off without a warning. When I tried turn it on again nothing would happen. After 10 minutes or so I could boot up the computer but after perhaps 5-10 minutes it would crash again.
I waited a little longer and then the computer ran more stable, but I noticed that when I would play a game or do something else that requires a little more power (even like watching videos online) it would crash.

It is not the PSU because my PSU is pretty new and definitely strong enough. I am kinda sure that it is not my video card because when I took out the video card and booted up it would still crash after a while (even though there is a higher chance of crashing when the card is in). Also the card ran at around 65° C a idle and the card can go up to 100°C.
I actually think that it's not my CPU's fault either because it runs with 30-40°C idle and max temp is 62°.

I also took out both RAMs but it still crashed. I also let it sit in the BIOS for a while and eventually it would also crash.

What else can I do?

Mobo: M2N68-AM Plus
GPU: ATI 4870 X2
CPU: AMD Phenom II X4 955
PSU: XFX Pro 850W

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October 2, 2011 at 14:12:03
From what you describe, it shuts down under many different circumstances. It doesn't appear to be a heat problem, so it can only be a power problem. Although you say your psu is fairly new, it could be failing. If you want to try a new one, buy it at a place where you can return it if that's not it.

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