pyram1dhead

It's a Rosewill Stallion 500W. I haven't added any new hardware inside since I built it a year ago, though, nothing that would cause it to suddenly stop working like this. edit: Come to think of it...I have been using a second monitor lately. Maybe that's the problem. I'm planning to upgrade to 4GB RAM soon, so hopefully that will take care of it if it is RAM corruption. Any other ideas?

I tried that, and still the same bug. I'm not so sure it's that kind of error, anyway - it doesn't reboot, it just locks up and then turns off. I'm beginning to think it is a hardware problem, as you said, though which part I'm not sure.

I built my current PC, and up until two weeks ago it worked like a charm. Since then, every so often the sound will stop, and a second later the machine turns itself off for no apparent reason. On restart, there's no message or indication of what happened, and nothing in the Event Viewer. Before I reinstalled XP, it started doing this fairly frequently. Since the reinstall, it now only crashes while I'm playing graphics-intense games, and sometimes while watching streaming episodes on the ABC website. I checked the Hardware Monitor, and it doesn't seem to related to overheating in any way. All my drivers, software etc. is up to date. * XP Home Edition SP2 * AMD Athlon 64 X2 6000+ * BIOSTAR TForce TF7025-M2 AM2 * nVidia GeForce 8800 GTS * Creative SB X-Fi * Seagate Barracuda 7200.10 350GB * G.SKILL DDR2 SDRAM 2GB