Oh yeah ! I agree OC the CPU regardless of the stepping jumping to 3 GHZ which I feel should be reasonable on your motherboard will give you more frames even with the current video card.
Check this out, very specific to your overclock
remember not all parts even when the same model are NOT created equalhttp://forums.extremeoverclocking.com/t272961.html
this is super specific to your CPU and motherboard
here is a general guide I was going to refer you outside toms but I figured one external link is plentyhttp://www.tomshardware.com/forum/259899-29-core-overclocking-guide