Computer Startup Problem -- what could be causing it

[bk12321]

My friend's computer starts up, sometimes he gets a BSOD and sometimes it starts up it's fine, and then after sitting there the screen will black out and you have to restart (if it started up and didn't get a BSOD). He reformatted twice and it still occurs.

Ram issue? Heat issue? what do you guys think?

 

[Shmuckety]

List specs. Is he overclocking?

 

[Aaron_ATX]

A while back I had a powersupply that was causing something similar on one of my test boxes.

 

[bk12321]

xp 2800+
256x2 major brand pc3200 ram

one of those $500 cyberpower computers basically, I dont know the exact specs.

 

[bk12321]

just switched the ram over to my computer, seems to be running well, will probably switch over the PSU soon.

EDIT: No, no overclocking I dont think.