Computer Crashes on Games

Primitus

Honorable
Jul 2, 2012
16
0
10,510
My computer has been crashing on certain games, but nothing else. I can type up papers on Microsoft Word, or watch livesteams/youtube videos for hours without having any problems. This problem of mine has been around for awhile now, but it hasn't bothered me up until recently. My computer would only crash on certain games that I do not play that often. Yesterday, I bought DayZ Standalone, and my computer can not run the game more than 10 minutes without crashing. The computer completely shuts off as if I cut the power completely from it. I had always thought it was my graphics card getting too old (maybe fried, I don't know :/ ) but now I'm starting to think it might be my PSU. My computer runs relatively cool, not passing over 60C when gaming, so I am 95% sure that it is a overheating problem.

Computer Specs:

Processor: AMD Phenom II X4 965 Processor @ 3.4 Ghz
RAM: 8.00 GB
Graphics: AMD Radeon 6670
PSU: 600W ATX Power Supply
Motherboard: ASUS M5A78L-M LX PLUS

I don't have a replacement PSU or graphics card to switch them out to see if one of them is the problem, but if anyone has a related issue I would appreciate your help.

Thanks ahead of time your help!