hm, it hasen't happened since I posted this, and I've left the computer running without a restart since. could that rule out the overheating problem? the entire thing is brand new, but i suppose it's possible to get something faulty lol. I've got a few spare powersupplies laying around, I could give one a shot, though they're rated as high as the current one which should be okay w/ my setup. No video card btw.