ASRock 990FX Extreme4 manual Installing Three CrossFireXTM-Ready Graphics Cards

2.6.1.2 Installing Three CrossFireXTM-Ready Graphics Cards

Step 1. Install one Radeon graphics card to PCIE2 slot. For the proper installation procedures, please refer to section “Expansion Slots”.

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Step 2. Install one Radeon graphics card to PCIE4 slot. For the proper installation procedures, please refer to section “Expansion Slots”.

Step 3. Install one Radeon graphics card to PCIE5 slot. For the proper installation procedures, please refer to section “Expansion Slots”.

Step 4. Use one CrossFireTM Bridge to connect Radeon graphics cards on PCIE2 and PCIE4 slots, and use the other CrossFireTM Bridge to connect Radeon graphics cards on PCIE4 and PCIE5 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.)

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ASRock 990FX Extreme4 Motherboard