Hi, I have issue with my system: ASUS M2N-E AMD Dual-Core Athlon A64 X2 3800+ 512MB DDR2 667MHz PC5300 CL5 KINGSTON Leadtek WinFast PX7600GT TDH FORTRON 400W ATX ARCTIC Freezer 64 PRO CoolerMaster Centurion 5 It repeatedly shutdowns (like if you would plug it off) every 30-50 minutes. Cooling is fine, temperatures are not going above 45C, PSU should be ok too because I've tested it on different one too. Its not even because of windows - it shutdowns even if leave it in BIOS. Memtest and other stability test were fine, voltage is fine too. I don't really know what is with that...