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ATI Catalyst™ 10.4 Preview features:

The ATI Catalyst 10.4 Preview provides resolution for the following issue:

Long load times for new maps in Battlefield: Bad Company 2 when using an ATI Radeon HD 5xxx series graphics card


Note! This driver is provided as is and is not supported by AMD. It has not completed full AMD testing, and is only recommended for users experiencing the particular issue described above. This release is not supported by ATI Radeon™ HD5800 Eyefinity 6 series of products.

For detailed instructions on how to install the driver preview, refer to:

Article GPU-33 for a Windows 7 based system
Article GPU-1 for a Windows Vista based system
Article GPU-2 for a Windows XP / Windows 2000 based system

Additional Recommendations:

If the issue continues to occur after installation of the driver preview, the following troubleshooting steps can help resolve the issue:
The problem may be a result of issues within the game application. Install any patches and / or updates available for the game application.

Contact the game developer for instructions on how to obtain / install the latest patches and / or updates for the game application

Conflict between the graphics card and motherboard’s BIOS version can cause performance issues. To reduce any hardware compatibility conflicts, install the latest BIOS version available for the motherboard

Contact the motherboard manufacturer for instructions on how to obtain / install the latest BIOS version for the motherboard

Installation errors that may have occurred during the installation of the game application may cause performance instability. Perform a clean install of the game application

First uninstall the application
Perform a fresh install of the application
Install any available patches / updates for the application
If the problem persists, reinstall the ATI Catalyst 10.4 Driver Preview
Installation errors that may have occurred during the installation of the ATI Catalyst Software may cause performance instability. Perform a clean install of the ATI Catalyst Software
For detailed instructions on the recommended steps for uninstalling / installing ATI drivers, refer to:
Article GPU-33 for a Windows 7 based system
Article GPU-1 for a Windows Vista based system
Article GPU-2 for a Windows XP / Windows 2000 based system

Applicable Products:
This article applies to the following configuration(s):
Hardware
ATI Radeon™ HD 5xxx series of products
ATI Radeon™ HD 4xxx series of products
Software
Battlefield: Bad Company 2
City of Heroes (Beta Release)
Operating System
Windows® 7 32bit
Windows® 7 64bit
Windows® Vista 32 bit
Windows® Vista 64 bit

http://support.amd.com/us/kbarticles...-4-Hotfix.aspx