HELP! I just purchased a Mach4 VIA KT400 Socket A ATX Mainboard, Model No.: KT400ALH and an Athlon +2400 processor. But, nowhere (not in the installation guide or their website) can I find what size power supply is suggested for this mainboard. Is 300W enough? 400W? 450W? Can someone give me some advice on this? I would very VERY much appreciate it. I don't want to underpower it. Also, is this processor going to work on this mainboard? The spec sheet is very VERY vague on just about everything