Asus Motherboard P7P55D - Manual (Page 122)

5-4 Chapter 5: Multiple GPU technology support
Chapter 5
Enabling Dual 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.
3. Select Enable CrossFireX.
4. Click Apply, and then click OK to exit
the window.
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