I would like to add a quick update. I started a new game on a standard map and I think that was my big problem. With the Cat 4.12 drivers and Anti-Aliasing turned to 0, the game runs smoothly. I think there was just a problem with playing tmy old saved game. The next step will be to play on a huge map and see if it's still smooth with faster load times and little lag. Thanks so much for the help vodkamattvt, you're a godsend!!