I have... P4 2.66Ghz 1024 PC2700 Geforce 6600 GT (OC'd ~10%) And even then I keep the graphics at about medium. The thing is there is SOOO much going on at once I have a feeling that processor power is what is holding me back the most. [Not to mention the Dell mobo I am still using. ] The new gfx card will help a lot but dont expect to run it at full throttle. Upping your Ram to 1024 would also help a lot and it would be the cheapest and easiest upgrade.