Much better price for that card than at bestbuy they wanted $204.00 for that same card, but the guy said u need a 450 watt pwr supply for it dunno for sure,i dont think there is any diff between the 2 except the 1600 is a 512mem card. Im trying to hold off on new builds for a bit as it costs me double with my son gaming some also hes on a amd1700+ im on a amdbarton2500+ so im real happy with the new graphics performance were getting on these older machines we can deal with the slow loading of some of these newer games at least for a bit lol...........So i thought the info might help some folks