I have a Dell optiplex gx620 without the proper power adapter. With my knowledge of Computers the power input on the back of the computer looks like a 8 pin cpu power socket. I was wondering if i could power this computer using an old 160watt psu with a dual molex to 8-pin adapter. I didnt know if the power worked correctly or if there would be a over powering or underpowering on one of the pins, so i havent tried it yet.