Download AMD Catalyst Display Driverfor Windows Vista/Windows 7/Windows 8 32 and 64-bit

• AMD’s first official unified and logo certified driver for Windows 8, Windows 7 and Windows Vista
  Target-Independent Rasterization (TIR): TIR is a new rendering path that enables superior anti-aliasing in Direct3D driver applications
• Native Stereo 3D Support: Windows 8 natively supports stereoscopic 3D gaming and videos via compatible applications
• Unified Video API: Video playback has been integrated into the DirectX® 11 API, enabling simultaneous video and gaming content. Transcoding performance may also be improved for supporting applications.
• Optimized screen rotation for rotation aware devices
  Improved sleep/resume performance
• Optimized GPU power consumption
  Major technologies / features also supported under Windows 8:
• AMD Eyefinity technology
• OpenCL™
• OpenGL
• Unified Video Decoder (UVD)
• AMD Dual Graphics
• AMD CrossFire technology
• AMD Overdrive
• AMD Catalyst Control Center
• Vision Engine Control Center

http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_vista64.aspx