AMD has released this month's Catalyst 8.7 driver today. This supports all DirectX 9 & 10 ATI Radeon video cards, which includes the Radeon 95xx+, Xxxx+, X1xxx, HD2xxx, HD3xxx, and HD4xxx series. Like every Catalyst monthly release, this driver set contains a few fixes for games running in Windows XP and Windows Vista. This driver set should work well with the new HD4xxx series, since the bundled driver on the CDs seem to have a few bugs.
List of Changes: http://game.amd.com/us-en/content/pdf/Catalyst_87.pdf
Download Link: Windows XP (32/64-Bit) / Windows Vista (32/64-Bit): http://game.amd.com/us-en/drivers_catalyst.aspx
Installation Instructions:
1.) Uninstall the ATI drivers from "Program Add/Remove"
2.) Install and Run Driver Sweeper with "ATI Display" selected. (It's recommended to do this, so that left over data from old graphics drivers don't conflict with the new ones.)
3.) Restart the computer.
4.) Install the new Catalyst drivers.