My mother board is an asus M4A-78E and my current cpu is an amd phenom 9600 quad, with 4gb mushkin silverline ram, asus 7770 1gb ddr5.. my current cpu bottlenecks my gpu so what would be a good upgrade? And the CPU needs to be compatible with motherboard, I just want it so I can just plug it in and play, no bios upgrade etc.. Thanks ~