Regular unwanted shutdowns.

[Gornall]

Posting this on behalf of a friend really as I've being having difficulty even coming to any kind of conclusion.

Basically, the computer boots fine, loads windows fine and can sit there and run most programs for a few hours without any problems.

Soon as something intensive is run, e.g a game the computer just cuts out and switches off within about 10-15 minutes.

The strangest thing is though, if rebooted straight away. The computer runs absolutely fine and can game all night without a hitch.

Ive thought about a faulty mobo or PSU but that wouldn't explain it working on reboot.

Anyone any input? I am pretty much gonna start the trouble shooting from scratch so where would you recommend starting?

Thanks.


/edit

All temps fine, reseated most hardware like GPU. Only reset upgrade is new graphics card. Specs Below

Abit IN9 32x Max
Core2Due E6600
4gb 4x1 DDR2 1000mhz
Gefore 280xt (I think, will clarify)
Windows Xp

 

[Gornall]

Ahh good good, I did tell him to try it with 1 stick of RAM. He should be getting back to me on that.

Would unticking that box cause it to bluescreen instead of shutting down then? So at least we can see the error?