I keep blowing out power supplies. It happens usually with a loud snap or a fizzle and a snap. I can see a flash come from the power supply through my case window. It can happen once a week or twice in a day, hot day, cold day, within a minute of turning on or within twelve hours. I could be touching the keyboard or leaving the computer unused for hours. What I'm getting at, is it seems random. It's happened about twenty times. Expensive high output power supplies have to be replaced. Cheap 300 watt supplies might survive one or two events before replacement. I've disconnected each of the two mirrored hard drives alternately and it still blows. I've disconnected the Fan speed contoller and the HP DVD RW. I've changed all of the seven fans. The mirrored raid set flashes "incomplete" whenever I boot up. I've reset it once, but it came up incomplete within a few starts. So, I think it's the Motherboard blowing out the power supplies....? I have a Soyo Dragon 2 Motherboard P4 2.4Ghz 800M 478P/512K HT RT and I haven't clocked it up. Ti4200-VTD8X video card two 80G Maxtor SATA HDrives in a Mirrored set. DDR 2X256MB Ram Sony Floppy It's the first computer I've ever put together. I may be slow, but I'm not dumb. HHHeeeellllllp !!!?