NVIDIA has issued a new beta graphics driver which is essentially a bugfix release. The bug added in R196.21 prevented the overclocking of GPU.
This beta driver is for GeForce 6, 7, 8, 9, 100, and 200-series desktop GPUs and ION desktop GPUs.
Update (2010.01.29) – OpenGL extensions
ForceWare 196.34 exposes 201 OpenGL extensions for a GeForce GTX 295 or 199 extensions for a GeForce 9600 GT. On GT200 architecture, ForceWare driver adds two extensions: GL_EXT_transform_feedback2 and GL_NV_transform_feedback2.
So ForceWare 196.34 exposes the same extensions than ForceWare 196.21.