If you are going to be playing with the RC of Windows 7 you’ll need the appropriate GPU driver to get the best from your system. The latest Catalyst drivers for AMD/ATI products is 9.4 for HD 4890 series down to the HD 2400. For more information on compatibility check the release notes.

Download: 32-bit | 64-bit (Windows 7)

….and NVIDIA released beta GPU driver set 185.81 for GeForce 6, 7, 8, 9, 100, and 200-series desktop GPUs.

More info: GPU compatibility list | Download: 32-bit | 64-bit (Windows 7)