I read this on a forum, check it out

"The NVIDIA 40.41 drivers are known to have visual flaws and performance problems (hitching) with the Unreal Tournament 2003 Demo which are not present in the 30.82 drivers. The issue has been addressed by NVIDIA and future drivers released by NVIDIA will contain the appropriate fixes.If you are currently running the 40.41 drivers please either downgrade to 30.82 or install newer drivers when available."


http://www.ina-community.com/forums/...hp?forumid=214

Maybe that's why i'm getting performance issues, I'm going to downgrade and see what's up.