My computer occasionally freeze and restart during games. It happened pretty often during Icewind Dale 2, maybe once in Doom 3, and every 4 hours or so of Half Life 2. Now I'm pretty positive that it's not overheating, considering I have a personal use oriented fan directed at the entire motherboard (the GPU fan is rattling when speeding, so I'm doing this until I replace it), and the computer is petty new, it was formatted, has new hardware and latest drivers. It's an AMD Athlon 3200+ with 1GB of DDR400 RAM, a 7600GS GeForce, and a Gigabyte GA-K8N51GMF mother board. I'm running Windows XP.