Random freezing

[fender]

I've got an older system (Athlon XP 2000) that started freezing randomly a few weeks ago. I've tried reinstalling Windows, but to no avail. In fact, it froze just as I was about to format the hard drive so it's definitely not a problem with Windows. I've ran some memory and hard drive test and both showed no errors. So it looks like the culprit is either the power supply or the motherboard - or could it be something else that's causing it?

CPU and hard drive temperatures are fine by the way.

 

[Dangman]

Which Memory and hard drive test did you run?
What are the temps?
What are the specs of the PC?

 

[fender]

Which Memory and hard drive test did you run?
What are the temps?
What are the specs of the PC?

Windows Memory Diagnostic, Memtest86+, HD Tune.
Hard drive temperature is around 30-35 degrees C and the CPU temperature is around 40 degrees C. Those are the only two that I know.
Specs are:
Athlon XP 2000
Asrock K7S41GX
512MB PC3200
30GB Maxtor
300W Fortron

 

[engiNURD]

Do you have another PSU you could try?