Download the 326.41 Beta driver, it offers support for Windows 8, Windows Vista, Windows XP and Windows 8.1 both 32 and 64-bit. This is a developer driver and seems to add opengl 4.4 support.
This driver enables GeForce to SHIELD streaming and is also a recommended driver update for the Windows 8.1 Preview. GeForce R326 drivers also provide performance increases for a variety of different games.
New in GeForce R326 Drivers
Performance Boost – Increases performance by up to 19% for GeForce 400/500/600/700 series GPUs in several PC games vs. GeForce 320.49 WHQL-certified drivers. Results will vary depending on your GPU and system configuration. Here is one example of measured gains:
GeForce GTX 770:
Up to 15% in Dirt: Showdown
Up to 6% in Tomb Raider
GeForce GTX 770 SLI:
Up to 19% in Dirt: Showdown
Up to 11% in F1 2012
Added SLI profile for Spinter Cell: Blacklist
Added SLI profile for Batman: Arkham Origins
Enables GeForce to SHIELD streaming. Learn more here.
Adds support for additional tiled 4K displays
Extended support for tiled 4K features
Installs new PhysX System Software 9.13.0604.
Installs HD Audio v220.127.116.11
Includes support for applications built using CUDA 5.5 or earlier version of the CUDA Toolkit.
Supports OpenGL 4.3 for GeForce 400-series and later GPUs.
Supports DisplayPort 1.2 for GeForce GTX 600 series GPUs.
Supports multiple languages and APIs for GPU computing: CUDA C, CUDA C++, CUDA Fortran, OpenCL, DirectCompute, and Microsoft C++ AMP.
Supports single GPU and NVIDIA SLI technology on DirectX 9, DirectX 10, DirectX 11, and OpenGL, including 3-way SLI, Quad SLI, and SLI support on SLI-certified Intel and AMD motherboards.