If used to have power supply from ATX PSU. It works great and nothing wrong with it until I connect positive side to the case and it is short circuit. Just find the one that have about 250 W or more I did use 250W one. All you need to do is put 4x10W resistor the white ceramic one between positive and negative in 2v output. and you also can put 16V 4700 micro Farad capacitor on the 12V output and 2 V output to make the output more stable.