It will work, just not well. I had to use that on someones machine recently, and I'm kind of worried that something will happen to it, but I dont think anything will. He's not using it for anything too straining, he's a 65 year old man, so he's not OCing either. Boards like the DFI need that extra four pins for the extra voltage for the RAM, and an adapter wont work. If you are not OCing or do anything too intense, I guess you could get away with it. I would advise it only as a temporary solution, until you get a new PSU that has a 24 pin ATX on it.