ASRock X79 Extreme3 manual Installing Three CrossFireXTM-Ready Graphics Cards, CrossFireTM Bridge

2.6.1.2 Installing Three CrossFireXTM-Ready Graphics Cards

Step 1. Install the identical 3-Way CrossFireXTM-ready graphics cards that are AMD® certified because different types of graphics cards will not work together properly. (Even the GPU chips version shall be the same.) Insert one graphics card into PCIE1 slot, another graphics card to PCIE3 slot, and the other graphics card to PCIE4 slot. Make sure that the cards are properly seated on the slots.

Step 4. Use one CrossFireTM Bridge to connect Radeon graphics cards on PCIE1 and PCIE3 slots, and use the other CrossFireTM Bridge to connect Radeon graphics cards on PCIE3 and PCIE4 slots. (CrossFireTM Bridge is provided with the graphics card you purchase, not bundled with this motherboard. Please refer to your graphics card vendor for details.)

CrossFireTM 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 X79 Extreme3 Motherboard