Having computer issues. Help?

[SLEEPN]

I built my computer last week. It's a completely new build. So here's the issue. Computer runs with no issues thus far while doing everyday tasks. However, when I start playing games, the computer will shut off after roughly 5 minutes. It does not restart. The issue is not heat. I exchanged the PSU with another, and the same thing occurred. I changed the voltages of my RAM to 1.7, thinking that was the problem, with no resolution. I believe the issue lies with the memory or the mobo, or the relationship between the two. I did have to manually set timings for my memory in the bios, it was running at 1066 7-7-7-20(21?) instead of 1333 9-9-9-24.

Here are my specs. If you can provide any insight, that would be great.

GIGABYTE GA-EP45T-UD3P motherboard
EVGA 896-P3-1255-AR GeForce GTX 260
Intel Core 2 Duo E8400
Corsair 2 x 1GB, TWIN3X2048-1333C9
ST3250310AS 250GB hard drive
CORSAIR CMPSU-650TX 650W ATX12V

 

[sirmonkey1985]

check the cpu voltage and see if it matches the rated cpu VID for that cpu.. since that board is known for having an insane vdroop.. the load voltage might be to low so when under load for gaming its crashing the system.. but usually you will get a BSOD that says machine exception error..