If you go here:
http://downloads.guru3d.com/download.php?det=1309You can download 83.40-WHQL. They're much better than the 82.12 beta crap I was forced to use with my AGP 6800GS, though still not perfect.
Guru3D also has a 83.60, but they would not work with my kit - I think the require a Dell machine.