I was tossing that in because it seems there are still instances that I'm not getting 30 frames a second.

Dualcore 2.8ghz, 4gb RAM, Geforce GTX250. It's not the top of the line, but it's miles beyond what the game should need. Yet, still having choppy framerate at times for some reason. Unless there are settings I don't know about, I'd say that giving it the whole CPU and GPU speed would help with that. I'm playing without Shadows or Weather Effects as well, makes no sense.