One tip I learned after my Abit RAID mobo died: Look at the capacitors on your motherboard, make SURE they have FLAT tops. If they have raised tops, the mobo died and you'll have to replace it or replace the capacitors. I NEVER thought of that until my dad looked at my mobo and was like, "Hey, these capacitors burst, no wonder the thing isn't working!" We thought it was the hard drive, but it was the capacitors. (I am now using the hard drive in this comp, a nice 40GB).