There's a new NVIDIA GeForce driver out, this time with build 177.72. This driver is available for both Windows XP and Vista in 32 and 64-bit versions.
This driver set is commonly distributed on many websites and it is receiving pretty good feedback.
Bare in mind this to be considered a beta driver, use it at your own risk. NVIDIA does not officially support them.
There are several discussion open on these drivers in the Guru3D NVIDIA driver forums, check them here. Driver wise, pretty much any GeForce graphics card after serier 8 is supported. We have virus & pest checked these drivers and they are scanned as clean. if you decide to give these a try, please post your feedback in this thread.
Cards supported:
[DEV_0191] NVIDIA GeForce 8800 GTX
[DEV_0193] NVIDIA GeForce 8800 GTS
[DEV_0194] NVIDIA GeForce 8800 Ultra
[DEV_0400] NVIDIA GeForce 8600 GTS
[DEV_0401] NVIDIA GeForce 8600 GT
[DEV_0402] NVIDIA GeForce 8600 GT
[DEV_0403] NVIDIA GeForce 8600GS
[DEV_0404] NVIDIA GeForce 8400 GS
[DEV_0420] NVIDIA GeForce 8400 SE
[DEV_0421] NVIDIA GeForce 8500 GT
[DEV_0422] NVIDIA GeForce 8400 GS
[DEV_0423] NVIDIA GeForce 8300 GS
[DEV_0424] NVIDIA GeForce 8400 GS
[DEV_05E1] NVIDIA GeForce GTX 280
[DEV_05E2] NVIDIA GeForce GTX 260
[DEV_0600] NVIDIA GeForce 8800 GTS 512
[DEV_0602] NVIDIA GeForce 8800 GT
[DEV_0604] NVIDIA GeForce 9800 GX2
[DEV_0606] NVIDIA GeForce 8800 GS
[DEV_0610] NVIDIA GeForce 9600 GSO
[DEV_0611] NVIDIA GeForce 8800 GT
[DEV_0612] NVIDIA GeForce 9800 GTX
[DEV_0622] NVIDIA GeForce 9600 GT
[DEV_0640] NVIDIA GeForce 9500 GT
[DEV_0643] NVIDIA GeForce 9500 GT
[DEV_06E0] NVIDIA GeForce 9300 GE
[DEV_06E1] NVIDIA GeForce 9300 GS
[DEV_06E2] NVIDIA GeForce 8400
[DEV_06E4] NVIDIA GeForce 8400 GS
[DEV_0848] NVIDIA GeForce 8300
[DEV_0849] NVIDIA GeForce 8200
[DEV_084A] NVIDIA nForce 730a
[DEV_084B] NVIDIA GeForce 8200
[DEV_084C] NVIDIA nForce 780a SLI
[DEV_084D] NVIDIA nForce 750a SLI
[DEV_084F] NVIDIA GeForce 8100 / nForce 720a
Have you read our GeForce 9600 GT review ?
Note:
If you have problems downloading GeForce ForceWare 177.72 Vista (32-bit),
please try to stop using your download manager
and avoid right clicking on files. Also, check
your firewall settings, because some mirrors may
require that you do not block the HTTP
referrers. 
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