Asus P5B Premium Series Hardware User Manual page 179

To enable CrossFire™:
1. Set the view to Advance.
2. Click the Crossfire™ item in Graphics Settings.
3. In the CrossFire™ Settings dialog, tick the box opposite Enable
CrossFire™.
Hotkeys
Click the Hotkeys tab on the Catalyst™ Control Center to access the
Hotkeys Manager, which allows you to create key combinations as shortcuts
for performing certain functions quickly.
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