cmdrdredd - refresh rate is set to 85. Changing it has no effect.
Nafets - I'm really not benchmarking the system. I'm just playing Assault with the Timedemo tool turn on. I tried different driver versions (29.42, 28.xx, 40.xx). They all do the same thing. I uninstalled and reinstalled the game which would have effectively replaced those files. And, yes, I know the uninstall leaves files behind. I manually deleted those before reinstalling.
BFG10K - I'm running it under D3D. V-sync is disabled for OpenGL. I don't see where, in the nvidia properties, to disable v-sync for D3D. How do I disable it for D3D? My refresh is set to 85, though, so I'd think I'd get at least 85fps, not 75fps. I'd like to investigate this first. Then I'll try the openGL method you suggest.
Is OpenGL the preferred method for running this game? Wasn't it originally built for Glide?
Edit: Did a search in the forums and see that v-sync for D3D has to be disabled using 3rd party software. I don't know why I never saw that using RivaTuner. I'll do that and try again. Still, with my monitor refresh at 85Hz, I don't know why I top out at 75?