Asus RAMPAGE III BLACK EDITION User Manual page 190

Enabling CrossFireX settings
1. In the Catalyst Control Center
window, click Graphics Settings >
CrossFireX > Configure.
2. From the Graphics Adapter list,
select the graphics card to act as
the display GPU.
Select Enable CrossFireX.
3.
Click Apply, and then click OK to
4.
exit the window.
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Chapter 5: Multiple GPU technology support
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