Download the 326.19 Beta driver, it offers support for Windows 8, Windows Vista, Windows XP  and Windows 8.1 both 32 and 64-bit

We have a large thread open on this driver right here in our forums.

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

• SLI Technology
• • Added SLI profile for Spinter Cell: Blacklist
  • Added SLI profile for Batman: Arkham Origins

Additional Details

• Installs PhysX System Software 9.13.0604.
• Installs HD Audio v1.3.26.4
• 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.

*Note: The following SLI features are only supported on Windows Vista, Windows 7, and Windows 8: GeForce GTX 600 series SLI, Quad SLI technology, 3-way SLI technology, Hybrid SLI, and SLI multi-monitor support.

Supported products

GeForce 700 series:
GTX TITAN, GTX 780, GTX 770, GTX 760

GeForce 600 series:
GTX 690, GTX 680, GTX 670, GTX 660 Ti, GTX 660, GTX 650 Ti BOOST, GTX 650 Ti, GTX 650, GT 645, GT 640, GT 630, GT 620, GT 610, 605

GeForce 500 series:
GTX 590, GTX 580, GTX 570, GTX 560 Ti, GTX 560 SE, GTX 560, GTX 555, GTX 550 Ti, GT 545, GT 530, GT 520, 510

GeForce 400 series:
GTX 480, GTX 470, GTX 465, GTX 460 v2, GTX 460 SE v2, GTX 460 SE, GTX 460, GTS 450, GT 440, GT 430, GT 420, 405

GeForce 300 series:
GT 340, GT 330, GT 320, 315, 310

GeForce 200 series:
GTX 295, GTX 285, GTX 280, GTX 275, GTX 260, GTS 250, GTS 240, GT 240, GT 230, GT 220, G210, 210, 205

GeForce 100 series:
GT 140, GT 130, GT 120, G 100

GeForce 9 series:
9800 GX2, 9800 GTX/GTX+, 9800 GT, 9600 GT, 9600 GSO, 9600 GS, 9500 GT, 9500 GS, 9400 GT, 9400, 9300 GS, 9300 GE, 9300, 9200, 9100

GeForce 8 series:
8800 Ultra, 8800 GTX, 8800 GTS 512, 8800 GTS, 8800 GT, 8800 GS, 8600 GTS, 8600 GT, 8600 GS, 8500 GT, 8400 SE, 8400 GS, 8400, 8300 GS, 8300, 8200 / nForce 730a, 8200, 8100 / nForce 720a

ION series:
ION LE, ION