Memory problem.... or is it?

[Flareon]

Hi guys

My PC likes to randomly reboot itself and leave nothing but a little message in the event log. After eliminating all the things it probably isn't, the only idea I have left is that I have a memory fault. However, I've run thorough memory tests with both memtest86 and the MS tool, with no results. This is with different physical slots for each RAM stick, one at a time.
I have however noticed that it only does this under stress (World of Warcraft ) and doesn't appear to do it if I only have one of the sets of memory in it, in either set of dual channel slots.
Thoughts? I'm considering buying a 2GB kit and ditching the old to fleebay.

Gigabyte DS4
Core2Duo E6400
2x Geil PC6400 4-4-4-12 (2x512mb)
Antec Neopower 480w
Connect3d X1950XT

Cheers.

 

[Curio]

Does it just reset, or do you get a BSOD first? It could be a dodgy PSU if it's just resetting with no errors. You can force Windows to throw an error instead of just resetting, which will tell you if it's PSU related.

 

[Flareon]

It just restarts, no BSOD, gonna set windows to throw a BSOD instead and we'll see. I imagine there is one since it creates an event afterwards.