Hey there, my computer is a few months old, and I've been plagued with random system restarts as well as random hangings. I've troubleshooted my PC quite a bit, and I would like to see what you guys think. My Specs: 5600+ Athlon X2 K8SLI-AM2 8800GT 512MB 2gb RAM (2x1gb sticks, unbranded) 500gb SATA HDD 480W PSU 2 Zalman fans, one on my CPU and one on the 8800GT. Both run below 50 on load. Running Windows XP 32bit with SP2 and updates. All drivers are the latest. What worries me the most is that the crashes seem totally random. I would be playing a game, and it would be fine for 3 hours ish, but when I play it again some other day, it hangs in 5 minutes. All these hangings and random restarts do not result in an error in the system log, and there are no error messages in Windows when the PC is rebooted either. The random hangs deserve a special note, because each time it does that, I can LITERALLY hear the system stopping, eg the sound runs fine then there's a screeching halt to it. I have to reboot to fix it. This leads me to believe that there may be a bad piece of hardware in there, so I've done a couple of things. I ran a Video Card stability test to check if there are no problems with it, and it ran fine for 4+ hours, until the PC itself restarted. I'm positive that the 8800GT is fine. I have done memory tests too, using ORTHOS and Prime95. So far, there have been no errors, so it cannot be a RAM problem. This narrows down the field to the CPU, PSU, and the motherboard. Based on the facts, I believe that I may have a faulty PSU, but I would like to know what you guys think before I rush out to buy a new one.