ASRock X99 OC Formula User Manual - Page 47
CrossFireX, 3-Way CrossFireX, 4-Way CrossFireX, and Quad CrossFireX, Operation Guide, Installing Two
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X99 OC Formula 2.11 CrossFireXTM, 3-Way CrossFireXTM , 4-Way CrossFireXTM and Quad CrossFireXTM Operation Guide his motherboard supports CrossFireXTM, 3-way CrossFireXTM, 4-way CrossFireXTM and Quad CrossFireXTM that allows you to install up to four identical PCI Express x16 graphics cards. Currently CrossFireXTM, 3-way CrossFireXTM, 4-way CrossFireXTM and Quad CrossFireXTM are supported with Windows® 7 / 7 64-bit / 8 / 8 64-bit / 8.1 / 8.1 64-bit OS. *If you install CPU with 28 lanes, 4-Way CrossFireXTM is not supported. 1. You should only use identical CrossFireXTM-ready graphics cards that are AMD certiied. 2. Make sure that your graphics card driver supports AMD CrossFireXTM technology. Download the drivers from the AMD's website: www.amd.com 3. Make sure that your power supply unit (PSU) can provide at least the minimum power your system requires. It is recommended to use a AMD certiied PSU. Please refer to the AMD's website for details. 4. If you pair a 12-pipe CrossFireXTM Edition card with a 16-pipe card, both cards will operate as 12-pipe cards while in CrossFireXTM mode. 5. Diferent CrossFireXTM cards may require diferent methods to enable CrossFireXTM. Please refer to AMD graphics card manuals for detailed installation guide. 2.11.1 Installing Two CrossFireXTM-Ready Graphics Cards Step 1 Insert one graphics card into PCIE1 slot and the other graphics card to PCIE4 slot. Make sure that the cards are properly seated on the slots. CrossFire Bridge Step 2 Connect two graphics cards by installing a CrossFire Bridge on the CrossFire Bridge Interconnects on the top of the graphics cards. (he CrossFire Bridge is provided with the graphics card you purchase, not bundled with this motherboard. Please refer to your graphics card vendor for details.) English 41