Ive looked it up and it seems they are in fact interchangable. I wonder if it has to do with the front panel board? If it powers up your GB board, it should be ok. What cpu are you using? Maybe the combination of cpu, hard drives, etc. is too much. This is more difficult than it should be, but isnt everything? :side: We will figure this out. Whitlock, we need your help! -maestro