I've been sorting through my collection of computer debris from past builds, seeing what I can resurrect and what I should discard. One mis-match I have is a Asus P5LD2 mobo with (what I think is) a P4 D830 processor. The motherboard has a 24-pin ATX power socket, but the only spare power supply I have is a Trendsonic 500W labeled "Pentium 4/Athlon," but no model number, which only has a 20-pin ATX power connector. Would the mobo boot up on a 20-pin connection? Would there be a risk of damage? If I did destroy both the mobo/CPU and PSU, it'd be no great loss, but I thought I'd check first. I recall reading that mobos that have an 8-pin ATX/12V connector can run with just a 4-pin connection if there is not a heavy current draw. Would it be similar for the main 20/24-pin ATX connector?