Well, I've got a GeForce 6600 Go (laptop), and running OpenGL apps with it, results on a system freeze (sooner or later). Someone with a GeForce 6800 Go had a similar problem.
I used drivers from the 1.0-6629 version, up to the latest one (1.0-8178), but the problem remains.
If you're curious, check the thread related to this issue here
But this must be a laptop specific issue, since I don't see people with desktop pcs talking about it.