People still continue to use the word bottleneck when it's a non-existent problem. Unless your using a cpu from the last generation you will never bottleneck any gpu setup with any modern cpu. The term bottleneck would mean that if your using a certain cpu, you would be stuck at certain framerates no matter what gpu you were using. Obviously, if you get a more powerful cpu, you will get a few more frames per second, but todays games are more heavily gpu dependent than ever, so of you have a monster gpu setup, you will increase peformance no matter what cpu you have. And a quad core phenom 2 can handle any game out there maxed out, if you have the graphical horsepower.