Well there are a couple things that could be holding you back. One is vsync. If this is on it only is as fast as your refresh rate(In 2000 it is 60). You need to set vsync as always off. I would also recomend going to http://www.guru3d.com/files/ and download the Geforce Tweak Utility. Install it and select the fast settings (it will optimize all your settings for you). Let me know if you have any other problems. I guarantee this will get you an extra 30 to 70% increase in fps.