medellion...if you want to run it stable past 1.5...then yes...not even a 300 W is not enuf. It's good to go 400+...60 bucks a compusa...just return that lil 250 W. I'm using compusa 400 W and i'm running it stable at 1540. But i had 60 dollar credit with newegg.com so i'm upgrading to an enermax and selling my compusa for 50. hehe I make money plus get a new P/S.