The offical Nvidia list of GPU's which are "vista" ready:

Windows Vista



Continuing our commitment to develop innovative products that enhance the end-user experience, NVIDIA has been working closely with Microsoft to identify and develop key hardware components for Windows Vista™, the next generation Windows® operating system. NVIDIA is working closely with Microsoft to develop and support key display components of the Windows Vista OS. NVIDIA fully supports the Windows Vista Display Driver Model, which will greatly improve the stability and performance of the OS. PCs equipped with NVIDIA graphics processing units (GPUs) and Windows Vista Display Driver Model drivers will also enable users to take full advantage of the new graphically rich user interface experience in Windows Vista.



NVIDIA offers a complete top-to-bottom line up of NVIDIA® GeForce™ graphics processing units (GPUs) that will take full advantage of the new Windows Vista features and functionality when the final OS is released.



We are supplying this information to assist enterprise customers procure and deploy PCs before Windows Vista launches. We will update this information as new products are developed that satisfy the criteria for the Windows Vista Ready PC program.



The following NVIDIA desktop GPUs are "Windows Vista Ready:"



GeForce 7800 GTX GPUs

GeForce 7800 GT GPUs

GeForce 7800 GS GPUs

GeForce 7300 GPUs

GeForce 6800 GPUs

GeForce 6600 GPUs

GeForce 6500 GPUs

GeForce 6200 GPUs

GeForce FX 5900 GPUs

GeForce FX 5700 GPUs

GeForce FX 5600 GPUs

GeForce FX 5500 GPUs

GeForce FX 5200 GPUs

GeForce PCX GPUs



NVIDIA is also fully supporting our mobile OEM partners for all needed drivers for Windows Vista Beta 1. Please see your OEM partner to secure the proper drivers for the devices they choose to support during this beta period.



The following NVIDIA notebook GPUs are "Windows Vista Ready:"



GeForce Go 7800 GPUs

GeForce Go 7600 GPUs

GeForce Go 7400 GPUs

GeForce Go 7300 GPUs

GeForce Go 6800 GPUs

GeForce Go 6600 GPUs

GeForce Go 6400 GPUs

GeForce Go 6200 GPUs

GeForce FX Go5700 GPUs

GeForce FX Go5650 GPUs

GeForce FX Go5600 GPUs

GeForce FX Go5200 GPUs

GeForce FX Go5100 GPUs



The following NVIDIA integrated corelogic is "Windows Vista Ready:"



GeForce 6100/6150 GPUs



The following NVIDIA workstation GPUs are "Windows Vista Ready:"



NVIDIA Quadro FX 4500

NVIDIA Quadro FX 4400

NVIDIA Quadro FX 4500 SDI

NVIDIA Quadro FX 4000 SDI

NVIDIA Quadro FX 4000

NVIDIA Quadro FX 3450

NVIDIA Quadro FX 3400

NVIDIA Quadro FX 3000G

NVIDIA Quadro FX 3000

NVIDIA Quadro FX 1400

NVIDIA Quadro FX 1300

NVIDIA Quadro FX 1100

NVIDIA Quadro FX 1000

NVIDIA Quadro FX 540

NVIDIA Quadro NVS 285

NVIDIA Quadro NVS 280



NVIDIA beta drivers for Windows Vista December CTP:



Updated NVIDIA graphics drivers are included in the Vista December CTP build, available directly from the Microsoft Developer's Network. These drivers are only compatible with Vista December CTP, version 5270.Winmain.051214-1910 and should not be used with other versions of Vista.