ASROCK FM2A75 Pro4-M Manual De Instrucciones página 22

Step 2. Connect two Radeon graphics cards by installing a CrossFire
Bridge on the top of the Radeon graphics cards. (The Cross-
Fire Bridge is provided with the graphics card you purchase, not
bundled with this motherboard. Please refer to your graphics card
vendor for details.)
Step 3. Connect the DVI monitor cable to the DVI connector on the Rad-
eon graphics card on PCIE1 slot. (You may use the DVI to D-Sub
adapter to convert the DVI connector to D-Sub interface, and then
connect the D-Sub monitor cable to the DVI to D-Sub adapter.)
22
CrossFire Bridge
ASRock FM2A75 Pro4-M Motherboard
or