Sounds like an odd problem. Only thing I can think of is that the wrong drivers are loaded for the Vid card. Best bet when switching cards is to delete the old drivers and reinstall the new ones. Whats odd about it is that its only happening on one game. I'd think if it were a driver prob, it would be on all games unless NBA Jams is different somehow. Try the driver thing and see what happens, worst comes to worst, you ruled out one possibility.