AMD Radeon HD 7900, AMD Radeon HD 7800, and the AMD Radeon HD 7700 performance in DirectX 9 applications may be slower under Windows 8 vs. Windows 7.
AMD CrossFireX configurations using the AMD Radeon HD 7900, AMD Radeon HD 7800, and the AMD Radeon HD 7700 in DirectX 9 and DirectX 11 applications may be slower under Windows 8 vs. Windows 7.
AMD CrossFireX configurations using the AMD Radeon HD 7900, AMD Radeon HD 7800, and the AMD Radeon HD 7700  in OpenCL accelerated applications may cause a BSOD or system hang.
Blacklight Retribution (DirectX11 mode) played with a CrossFire configuration may result in a system crash when launching the application (32-bit OS only). 
Video corruption can be seen when playing back movie trailers with Metro video player.
Instructions:
 
Download and install the Driver from the following location:
Note! This Driver is provided “AS IS” and under the terms and conditions of the End User License Agreement provided therewith. 
Applicable Products:
This article applies to the following configuration(s):
Hardware:
- AMD Radeon HD 7900 Series
 
- AMD Radeon HD 7800 Series
 
- AMD Radeon HD 7700 Series
 
- AMD Radeon HD 6000 Series
 
- AMD Radeon HD 5000 Series
 
- AMD Radeon HD 7000M Series
 
- AMD Radeon HD 6000M Series
 
- AMD Mobility Radeon HD 5000 Series
 
- AMD A-Series APU
 
- AMD C-Series APU
 
- AMD E-Series APU
 
- AMD FirePro V9800
 
- AMD FirePro V7900 
 
- AMD FirePro V7900 SDI
 
- AMD FirePro V7800P
 
- AMD FirePro V5900
 
- AMD FirePro V4900
 
- AMD FirePro V3900
 
- ATI FirePro V9800
 
- ATI FirePro V8800
 
- ATI FirePro V7800
 
- ATI FirePro V5800
 
- ATI FirePro V5800 DVI
 
- ATI FirePro V4800
 
- ATI FirePro V3800
 
- AMD FirePro 2270
 
- ATI FirePro 2460 Multi-View
 
- AMD FirePro M8900
 
- AMD FirePro M5950
 
- AMD FirePro M3900
 
- ATI FirePro M7820
 
- ATI FirePro M5800
 
Operating Systems:   
- Windows 8 32-bit Edition
 
- Windows 8 64-bit Edition