Asus P9D WS - Manual (Page 152)

5-6 Chapter 5: Multiple GPU technology support
Chapter 5
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Enabling Dual CrossFireX technology
1. In the Catalyst Control Center window, click Performance > AMD CrossFireX TM .
2. Select Enable CrossFireX TM .
3. Select a GPU combination from the drop-down list.
4. Click Apply to save and activate the GPU settings made.
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