when i had my amd phenom II x4 965, at like 3.7ghz, i would be getting say 30fps in a random game, and now i have upgraded to a 2600k at 4.5ghz, im getting like 40fps this is to be expected but what i dont get is why. i look on task manager mid game, and the cpu usage of the amd chip was at like half way to 3/4 way up on all cores. now obviously the 2600k is a little lower, but what i dont get is why does the 2600k offer a fps boost when the amd chip wasnt even apparently working at full load in the first place the obvious explanation as to the better fps when upgrading cpus is that it is bottlenecking the gfx card. but i dont see how the 965 could have been (for a start i only have a 4870 and thats no gtx 590) and besides it wasnt even at full load. like; where has this extra fps come from?