•In single VGA card mode, use first 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 sufficient power when running

CrossFireX™ mode. See page 2-36 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 2-34 for details.

2-22

Chapter 2: Hardware information