I use 30.82. Performance is usually pretty good with those.

I will try that one too.

EDIT:
Not even are the system around 10 points faster, it is way more balanced using 30.82.
It's that nVidia driver thing, wich I can't get used to. Really a bread subject. 🙁

I found that the older / period correct drivers often work better for Nvidia.

Detonator 5.22, 6.32, 7.97, 10.40, 23.12 are all good candidates. Earlier drivers also allow for more FSAA modes (such as 3x3 and 4x4) that the later ones simply won't. All in all they look quite great and performance is good when using 640x480/800x600 @ 32BPP

if you have a very fast cpu(k8 or core2 for example), 66.93 is recommended.
if your cpu is slow(6x86mx for example), 30.82 is recommended.

Thanks all... Going to do some testing now. Not shure when I will do it, as I have so many retro-projects and retro-stuff to do these day's.