PC Reboots During 3D Games!!!

[Totempole]

Started about a week ago (after reloading Windows 7... Not so much reboots, it actually powers of completely and then powers back on (I know because I have LED side fans which power off as well.). Before I go any further let me post my PC details:

CPU: C2D E8400 @ 3.00GHz
Ram: 2x 2GB Kingston DDR2 800
Mobo: MSI P43 Neo-F
GFX: MSI GTX 260 (216) TwinFrozr OC
HDDs: 250GB & 320GB Seagate
Optical Drives: 2x LG DVD-Writers
PSU: Aopen 700watt
OS: Windows 7 Professional 64-Bit

These PC cutouts are completely random and only happen during 3D intensive games. Ive taken my entire PC apart and rebuilt it, and nothing helps. It could happen within 5 minutes or it could be as long as an hour before the PC cuts out.

I'm praying it's not my PSU, because it's just out of warranty, in fact I'm praying it's nothing hardware related, since I can't afford to replace anything right now. The thing is, the PC works 100% as long as I don't run any 3D Games.

Heres what I've tried so far:

1. Updating my graphics card drivers
2. Rebuilding and dusting out my PC
3. Loading BIOS defaults
Monitored Temps: All Fine, CPU: Stays Below 40C Graphics Stays Below 65C

I don't have any other components I can try, so my last resort is to reload Windows again.

Any advice that doesn't require additional hardware, or the most likely problem would be
much appreciated. Thanks.

 

[Totempole]

Best answer selected by Totempole.

 

[JVW]

Thanks Totempole, I'm going to lower the settings of my games and see what happens. Sadly that will be a job for tomorow, no time today. I have found someone with a 600W PSU I can use for testing and who I can give my GTX280 for testing, incase its not my PSU. Hope I can play again next week (NFS Hot Persuit is coming out the end of this week).

Thanks for the help!

 

[masky007]

Thanks Totempole, I'm going to lower the settings of my games and see what happens. Sadly that will be a job for tomorow, no time today. I have found someone with a 600W PSU I can use for testing and who I can give my GTX280 for testing, incase its not my PSU. Hope I can play again next week (NFS Hot Persuit is coming out the end of this week).

Thanks for the help!

NFS is already out i think 😉