Well my mouse has 2000-DPI, so ideally my GPU would have 2000 stream processors so each precision dot could be handled seperately. I'm told it should run on a 4870 though, since the clock is fast enough to run 2 or 3 dots per stream processor almost simultaneously. Maybe more speed is required though, I'm just concerned as the 280 has less stream processors and that's obviously quite essential in what kind of periferals I can use.
I will be changing my mouse though, look at this baby
http://www.overclockers.co.uk/showp...me=SteelSeries World of Warcraft Gaming Mouse