hi, new user, i came here with the direst need. for months my new system worked like a dream, but suddenly it stopped working. at first it was giving me a beep code that meant the ram was bad-or not present- but i put it in another board and it worked fine. then i discovered my board has some problems with certain brands of ram operating at 800mhz, so i clocked it back to 667 and it worked fine for a few days. now, it boots up to windows, gets a few minutes in, and then freezes or restarts (it just restarts, i can hear the drives spinning up, but i get no display). the temp is high, but well within limits (around 40 at boot, rising to 50 at windows), ive done everything i know to do. i suspected at first it was the mobo, but now im suspicious of the power supply. please help! im at wits end here !!