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2-18 Chapter 2: Hardware information
• In single VGA card mode, use rst the PCIe 2.0 x16_1 slot (blue) for a PCI
Express x16 graphics card to get better performance.
• In CrossFireX™ mode, use the PCIe 2.0 x16_1 (blue) and PCIe 2.0 x16_2
(black) slots for PCI Express x16 graphics cards to get better performance.
• Use the two PCIe 2.0 x16 slots and the universal PCIe x16 slot for 3-Way
CrossFireX™ mode.
• We recommend that you provide sufcient power when running
CrossFireX™ mode. See page 2-32 for details.
• If one of the PCIe x1 slots is occupied, the universal PCI Express x16 slot
(black) will downgrade to max. x1 speed.
• Connect a chassis fan to the motherboard connector labeled
CHA_FAN1/2/3 when using multiple graphics cards for better thermal
environment. See page 2-30 for details.