the x800GTO wipes the floor with a 7300GT,and it should run fine,if not,a cheap psu can be bought.Doesn't have to be fancy,just make sure its on the heavy side so you know you're getting good quality in it.
i'll have to agree, have one, and i've never purchased a better card. and no, my x800 could never run on a 305w, it would burn up like an egg in the san francisco heat on the side-walk... get what i'm saying?
@janco. Get the 7600GS, after rebates it only like 80 bucks, better card than the 7300gt.