ATI has released new Catalyst 10.5 drivers for Windows XP, 7 and Vista

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 Windows XP 32-bit download from Guru3D.com
ATI Catalyst 10.5 WHQL Windows 7 | Vista 32-bit download from Guru3D.com
ATI Catalyst 10.5 WHQL Windows 7 | Vista 64-bit download from Guru3D.com