ATI has released new Catalyst 10.5 drivers for Windows XP, 7 and Vista
>> ATI Catalyst 10.5 WHQL Drivers
New Windows Features
Support for 120 Hz displays for ATI Radeon™ HD 4000 Series and ATI Radeon™ HD 3000 Series GPUs
ATI Catalyst™ driver now supports 120 Hz Displays for the ATI Radeon™ HD 4000 and ATI Radeon™ HD 3000 Series graphics cards
>> ATI Catalyst 10.5 WHQL Drivers