My MacPro Xeon power supply started "putt-putt-putting" a couple of weeks ago, then died abruptly. I'm resigned to replacing the power supply one way or another; but, before buying a replacement, I just want to check to see if my old G5 PowerMac might have a compatible power supply. Anybody know, just off the cuff? My Xeon is 8 Core, and I think it has a 980w power supply. Is the G5 PowerMac anywhere close?