AMD ATI Radeon HD 4890 User Manual page 18

12 ATI CrossFireX™ Technology
2.
From the Graphics Adapter list, select the graphics card to act as the display
GPU.
3.
Select Enable CrossFireX™.
Note: The Choose from the following Rendered GPU combinations drop-
down list automatically populates with all available render GPUs based on
the selected display GPU. The list displays only GPUs that can be enabled
for ATI CrossFireX. Other combinations are not listed here but may be listed
on the CrossFire™ ▷ Diagnostics page.
4.
From the list, select the appropriate combination.
Note: If the selected combination is not the most optimal choice for your
system, a message appears at the bottom of the page notifying you of this.
5.
Click Apply.
In some configurations, when ATI CrossFireX is enabled, GPU Accelerated
Physics is automatically disabled for all cards in the configuration as are all
displays except the one used by ATI CrossFireX.
ATI Radeon HD 4890 © 2009 Advanced Micro Devices, Inc.