Random computer freezing/shutting down

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Joined
8 Mar 2010
Posts
41
Howdy, I'm writing this for a chum who's having some computer-related problems, I hope you can help!

Okay, he's done no overclocking or anything, everything's running at stock speeds, and he has good cooling. The PC will run normally for a while, but then crashes after about 20 minutes. The screen will just freeze and he has to turn it off/on.

We're not sure what the problem could be. As I said, everything at stock speeds, voltages are normal, etc. He's reset the BIOS and still the problem persists.

Specs:
XFX 790i motherboard
GTX 260
OCZ 16000 (but running at 1333 mhz rather than 2000, I just found out)
2x750 GB HDs in RAID
Q9400 CPU

Anyone have any idea what's wrong?
 
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