So, heres my setup for starters: AMD 2600+ @ 2.06, 1GB Geil DDR400, Shuttle AN35 Ultra(Nforce2 chipset), 350W PS, 1 HD/Floppy/CD-DVD, one intake and one exhaust fan. FX5900 128MB, Chaintech AV-710(Audigy 2 comparable). Windows XP Pro, SP2 of course. Basically, whenever I play World of Warcraft, or Frozen Throne, or almost any of massive 3d intensive game(hasent done it to Leisure Suit Larry yet...) after a while, the sound hangs and the system freezes, forcing reboot. I used to get a blue screen sometimes, pointing to Nvidia drivers, so after playing with TONS of drivers, OG mobo drivers, Nvidia rollbacks, whatever, I've got rid of the blue screen shit... But still have this hanging sound/freezing system shit. It's driving me fucking mad. Sometimes I can play for 2-3 hours and nothing. Sometimes an hour, or 20 minutes. Its totally fucking random. I'm running massive burn-in tests as we speak, but I know its not memory or processor related. I've got the FSB freq. set at 166, and the memory freq. on SPD(which results in a 400 mhz memory frequency, enabling DDR). I'm fucking stumped, and I'm hoping OT can help before I start formatting and/or upgrading parts.