I have a weird question. I'm modifying an ATX power supply to use as a bench power supply for my various projects (it's amazing how often one needs 3, 5, or 12 volts) and I was wondering about one of the rails, specifically the -12v. What is it for? It can't handle much current, all the other rails can handle 15 or so amps but -12v on every power supply I've seen can't handle more than a few hundred milliamps. I would imagine it would be coupled with the +12v rail for a total of 24v in a few rare instances but even those I can't find. All the fans I've seen run 12v. I'm asking you because you are all brilliant plus it's damn near ungoogleable. Even advanced search options seem to disregard -12.