Ok, found out my problems are due to not paying close attention to how my molex > 12v p4 adapter is wired. I just bought one from a PC recycling place assuming that all are wired the same - WRONG! Said connector needs 2 wires of 12v and 2 ground where mine has 1 12v, 1 5v and 2 ground, which are on the wrong wires anyway. The good news is that the system runs with a store bought power supply and I got windows installed and all. Thanks Best Buy for accepting easy returns - gonna get this back tomorrow Gonna get a 12v p4 > 12v p4 adapter to go straight from my M2-ATX tomorrow.