I tend to play games at lower resolutions such as 1280x960 or sometimes 1600x1200, and lots of source based games, so my 1Ghz overclock on my CPU does make a difference. I tend to run my games at a comfort threshold, stacking on as many quality features as possible to the point where the game is still just barely very smooth during the majority of gameplay at about 50-60fps average. As long as my mins don't go under 30 I'm generally happy. If you turned off my overclock, my framerates would probably be riding in the 40s, and would dip into the 20s, which I'd definitely notice as choppy.