Always go for the most beautiful wife, the smartest dog, and the biggest power supply;) I was running 3hd a 40 speed cd a 16 speed CDR and an internal ZIP. Started having troubles with the beast dying every time I printed. I went from a 350 that cooked to a 450 and also got a surge supressor outlet to isolate the computer power from monitor and printer. So far three years, no problems.