Hmm, I don't think so, but I'm not and expert in switching power supplies.Originally posted by Maveric169
I always thought the negitive rails were to keep the electrical "flow" ballanced. With just a general ground a switching PS output would become unbalanced everytime it "switches" and prevents a voltage spike with the negitive voltage draw. But that is a good question, and I have never in all the years working on pc's ever heard an explanation for that.
HDD:s and optical drives use both 5V and 12V. HDD:s use more amps on the 5V than on the 12V if I remember the readouts from my MP3-player project correctly.Originally posted by XP Abuser
devices like fans hdds, cd drives use the 12 v rail