nVIDIA has released the latest official Forceware 175.19 drivers and natively support the GeForce FX (XP only), 6, 7, 8, and 9 series. They also have been WHQL certified, meaning that they have gone through testing at the labs of Microsoft.
You can grab the latest official Forceware drivers at nVIDIA's website:
Updates:
* WHQL-certified driver for GeForce 6, 7, 8, and 9 series GPUs.
* Improved 3D performance and load times for GeForce 8 and 9 series GPUs in some DirectX 9, DirectX 10 and OpenGL applications as a result an improved shader optimizer.
* Supports single GPU and NVIDIA SLI