I just bought a new setup, Athlon 64 3000 Gigabyte K8NS Ultra-939 1GB Samsung 400mhz pc3200 Dual Channel 550 watt power supply PNY GeForce 6800 GT 256mb Win XP Pro SP2 My games keeps freezing every few secs for a few secs. Seems like the intense ones like battlefield 2 and Far Cry. Installing programs causes it to restart. Iv'e replaced the Processer, replaced the mother board, tried 8 different RAM sticks at different speeds, Tried different harddrives (IDE and SATA), different PS from 420 watt to 550 watt, tried a different video card. I've also tried fresh formats with no other devices ( meaning just hard drive and video card), tried different video card drivers (newest, betas, and older), updated BIOS and all drivers. I've been reading forums for the last week and a half. I'm at my wits end right now. Could someone please help me?