Much thanks to everyone who responded to my origial question regarding using an ATI 5550 with an AMD X2 240 proc 4 gig ddr3 mem (2 sticks) 1 sata hd and a coolermaster elite 350 psu. I was advised that I could easily upgrade to a 5570 with no problems. I did and so far so good even with a bit of overclocking with catalyst control center. My question is if I have a bottleneck in the future where would it be for a light gaming system? Once again thanks to all who responded to my original post.