Hi ladies and gents this is my first post here. Before i get started i will list to best of my ability my pc specs.If theres something i missed feel free to ask. operating System Windows Xp Home Sp2 Mobo Abit sg-72 rev1.1 Chipset SiS661fx CPU Intel 3.0 Ghz Prescott (cooled by Arctic Cooling freezer 4) Audio Soundblaster live 5.1 Vid BFG 7800 GS OC 256mb agp PSU Xion 500w Dual rail 38amp Memory 1024mb Kingston pc3200 Chassis Thermaltake Soprano 120mm + 90mm Exhaust Fans 120mm Intake Fan Aerocool Gatewatch 101 Fan and Temp Controller Monitor Acer Al1916w Speakers Logitech z640 Primary Master Maxtor 80GB Slave Western Digital 80GB Secondary Master Maxtor 60GB Slave Pioneer DVR-112D DVD\RW ok i think thats out of the way, now down to the issue. When i turn on my pc it often reboots up to 3 or 4 times before it actually comes on. Sometimes it also makes it to windows login screen but screen goes black and stays that way until i hit reset and other times i get the BSOD but it blinks on the screen so fast i can't even read what the error says.Once its up and running after the normal daily boot it can remain on for the whole day which is usually 16 hours or more here without any locking\freezing\reboots.It runs pretty smooth,no slow downs and CPU only runs in mid 40C range when under full load.The PSU voltages appear normal and obviously overheating is not an issue.Ive also ran Powermax diagnostics on the boot drive as well as memtest on the memory and both have passed so this ones really got me stumped.Any help would be appreciated.