I recently replaced the PSU I had which was a 250 for a 350 which solved random lockups in windows. Now I just started to play some FPS games again like Prey, CS, DOD and my system locksup after about 1hr of gameplay. The lockup basically I still see the picture of the game but the sound loops. I cannot ctrl-alt-del only pushing the reset button helps. I do NOT have overdrive enabled on the card but when I go back into ATI control panel my temp on the card is 53c which I thought isnt that high. Can someone help me figure out the problem? Shuttle EQ8001 Unit AMD64 754 Clawhammer 3700+ 2gig Ram ATI x800 XT PE 80gig HD SATA External USB DVD-ROM Mouse/Keyboad USB 350watt noname PSU My volt readings with Speedfan: +3.3V = 1.92 +5v = 5.05 +12v = 11.31 VCOREA = 1.90 VCOREB = 1.94 -12V = .47 -5v = 1.59 +5VSB = 5.46 VBAT = 0.00 VcoreA = 1.50 VcoreB = 1.51 +3.3v = 3.31 I heard underclocking the AGP to 4x could help. I havent tried that yet. Fast writes are OFF. If anyone has suggestions much would be appreciated.