Thanks. You saved me the trouble of testing both GPU's myself
Plus, don't forget the $$ savings over the life of your computer in reduced energy costs from not having an extra card and the massive decrease in noise that comes from not having to cool the card!!!
I just rebuilt a computer that had that card (or was it a 9600?) and am using the 4570S. The noise difference is phenomenal. My machine went from being a good alternative to a wind tunnel to something that I have to actually LOOK at if I want to know whether it's on--that's how quiet it is.