ASRock P55 Extreme4 Quick Installation Guide - Page 22

Step 4. Step 5. For Windows® 7 / VistaTM OS: Install the CATALYST Control Center. Please check AMD website for details. Restart your computer. Install the VGA card drivers to your system, and restart your computer. Then you will find "ATI Catalyst Control Center" on your Windows® taskbar. ATI Catalyst Control Center Step 6. Double-click "ATI Catalyst Control Center". Click "View", select "CrossFireXTM", and then check the item "Enable CrossFireXTM". Select the option according to the total GPU number on the Radeon graphics cards. Click "Apply". English Although you have selected the option "Enable CrossFireTM", the CrossFireXTM function may not work actually. Your computer will automatically reboot. After restarting your computer, please confirm whether the option "Enable CrossFireTM" in "ATI Catalyst Control Center" is selected or not; if not, please select it again, and then you are able to enjoy the benefit of CrossFireXTM feature. Step 7. You can freely enjoy the benefit of CrossFireXTM or Quad CrossFireXTM feature. * CrossFireXTM appearing here is a registered trademark of ATITM Technologies Inc., and is used only for identification or explanation and to the owners' benefit, without intent to infringe. * For further information of ATITM CrossFireXTM technology, please check AMD website for updates and details. 22 ASRock P55 Extreme4 Motherboard