I recently upgraded my old Asus p4p800 motherboard to a p4p800-E Deluxe. I did a clean install from 2000 to XP Pro. I also had to swap out my old Antec 350W power supply(died) for an Antec 450. I have two soundcards installed along with an ATI Radeon 9800XT 256. Now whenever I'm in Win XP, the computer will restart randomly, although this happens quite often when I'm gaming or making music in Cubase SX. Any suggestions as to what the source of the problem is?