ASROCK Z68 Extreme7 Gen3 Manual Del Usuario página 29

TM
CrossFire Bridge
Step 5. Connect the DVI monitor cable to the DVI connector on the Radeon graph-
ics 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.)
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ASRock Z68 Extreme7 Gen3 Motherboard