I currently have a radeon 4850, and my motherboard supports CF. I was going to get a 5770 and sell my 4850, but then I thought that I could buy a 4870 and CF with my 4850. What kind of performance would I get here? Possibly around a 5850? Thanks in advance.
PS. What power supply should I get if I need three 6pin power connecters (2 for 4870, 1 for 4850)? My budget is around 50-70$. Thanks.