ATI Catalyst for Windows Vista

Compatible with :

ATI RADEON HD 3870 Series
ATI RADEON HD 3850 Series
ATI RADEON HD 3600 Series
ATI RADEON HD 3400 Series
ATI RADEON HD 2900 Series
ATI RADEON HD 2600 Series (PCle)
ATI RADEON HD 2400 Series (PCle)
ATI RADEON X1950 Series
ATI RADEON X1900 Series
ATI RADEON X1800 Series
ATI RADEON X1650 Series
etc

http://ati.amd.com/support/driver.html