First post, by Xenphor
The game I was trying was Sin.
I tried nglide and that seems to work the way I expected; I left v-sync on in game, off in nglide, and I didn't notice a stutter, using same refresh rate/resolution. I always set my display to 60hz for v-sync no matter what game. The only problem is that it does seem to drop frames during explosions or other scenes, maybe because of lighting effects (?).
But if I just stare at the ground and pan the camera in circles, there doesn't appear to be any stutter.
Is there a reason why games using the same engine such as Quake 2 can run natively from openGL but others can't, like Sin? Does Nvidia add special exceptions to their drivers?