Power supply time for sure. Spend your money wisely and get the best 300-350 Watt you can afford. The only reason I got the 500 was because at the time I had money to burn, and I kinda like popping the case open every once in a while and tweaking around in there.
If you just want the best performance, with the least amount of work, just get what you need.
i went today and bought a antec atx12v for $60 installed it and all but one screw fits its a 350watt dual fan and lots of expantions options wow my old psu had just 2 extra now it got like 8 but this cpu is finished now i can start my new game cpu i get to start once i get back to work (im laid off) so im gonna go look tomrrow morning thanx for all your help jim