The information in this article applies to the following configuration(s):

• ATI Radeonâ„¢ X1650 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
Unable to enable Crossfire while switching between the user accounts

The information in this article applies to the following configuration(s):

• ATI Radeonâ„¢ HD2600 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
Abnormal behavior observed on disabling crossfire on an extended display configuration

The information in this article applies to the following configuration(s):

• Catalyst Control Center
• Radeonâ„¢ HD 2900 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition
• Windows XP Professional
• Windows XP Home Edition
• Windows XP Media Center Edition
• Windows XP Professional x64 Edition

Symptoms:

Enabling CrossFire followed by setting the Overdrive clocks to their maximum settings may result in the Catalyst Control Center failing to accurately report the requested Overdrive values

The information in this article applies to the following configuration(s):

• Catalyst Control Center
• ATI Radeonâ„¢ HD2900 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition
• Windows XP Professional
• Windows XP Home Edition
• Windows XP Media Center Edition
• Windows XP Professional x64 Edition

Symptoms:
Crossfire cannot be enabled on extended display connected to the secondary DVI of Primary adapter.

The information in this article applies to the following configuration(s):

• Catalyst software suite
• Radeonâ„¢ HD 2900 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
When running certain OpenGL applications, the Radeon graphics card may not be running at the requested click values on a crossfire configured system

The information in this article applies to the following configuration(s):

• Catalyst Control Center
• Radeonâ„¢ X1650 series
• Radeonâ„¢ X1600 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition
• Windows XP Professional
• Windows XP Home Edition
• Windows XP Media Center Edition
• Windows XP Professional x64 Edition

Symptoms:
Catalyst Control Center-> 3D->Anti-Aliasing: Unchecking the option to Use Application Setting found in the 3D aspect page when CrossFire is enabled may result in the maximum AA setting being 6x.

The information in this article applies to the following configuration(s):

• Quake 4
• Radeonâ„¢ X 1650 series
• Radeonâ„¢ X 1600 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
Playing the game with CrossFire enabled results in corruption being noticed after a short time of game play

The information in this article applies to the following configuration(s):

• Radeonâ„¢ X1950 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
The color depth may change to 8bpp when enabling or disabling CrossFire for the first time

The information in this article applies to the following configuration(s):

• Radeonâ„¢ X1950 series
• Radeonâ„¢ X1900 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
Performing an un-install of the display drivers on a CrossFire configured system may result in extended desktop mode becoming active resulting in all of the desktop icons failing to appear

The information in this article applies to the following configuration(s):

• Doom3
• Radeonâ„¢ HD 2600 series
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
Flashing is observed when loading the game, or during some of the cinematic, or during game play when Catalyst AI is disabled, AA is set to 8x, and CrossFire is enabled