ASROCK Fatal1ty Z77 Professional Serie Manual Del Usuario página 24

Step3. Align and insert SLI_Bridge_2S Card to the goldfingers on each graphics
card. Make sure SLI_Bridge_2S Card is firmly in place.
Step4. Connect a VGA cable or a DVI cable to the monitor connector or the DVI
connector of the graphics card that is inserted to PCIE2 slot.
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Fatal1ty Z77 Professional Series Motherboard