My xbox 360 power supply converted to bench supply has problems with voltage climb at medium loads (9 ish amps out of 15 max) and on. I'm looking for a way to keep the voltage a steady 12v even at max load. One possible way to do this is to use a mosfet as a voltage regulator, since a standard one would be dissipating a lot of heat. Are there any other ways of accomplishing this?