Asus Rampage II Extreme User Manual

Page 53

• 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

(blue) slots for PCI Express x16 graphics cards to get better performance.

• Use the three PCIe 2.0 x16 slots for 3-Way CrossFireX™ mode.
• If you install a PCIe x16 graphics card on to the PCIe x16_1 slot, a PCIe

device with a bandwidth faster than x8 link to the PCIe x16_2 slot, and a

PCIe device with a bandwidth slower than x4 link to the PCIe x16_3 slot,

the three PCIe x16 slots will work at x16, x16, x1 link as the default.

• If you install a PCIe x16 graphics card on to the PCIe x16_1 slot, a PCIe

device with a bandwidth slower than x8 link to the PCIe x16_2 slot, and a

PCIe device with a bandwidth faster than x4 link to the PCIe x16_3 slot, the

three PCIe x16 slots will work at x16, x8, x8 link as the default.

• You may manually reassign the link width of PCIe x16_2 and PCIe x16_3

slots in BIOS settings. See page 3-27 for details.

• We recommend that you provide sufficient power when running

CrossFireX™ or SLI™ mode. See page 2-38 for details.

• Connect a chassis fan to the motherboard connector labeled

CHA_FAN1/2/3 when using multiple graphics cards for better thermal

environment. See page 2-35 for details.

VGA configuration

PCI Express operating mode

PCIe x16_1

PCIe x16_2

PCIe x16_3

Single VGA/PCIe card

x16 (Recommend

for single VGA)

x8 (PCIe card)

Dual VGA/PCIe card

x16

Triple VGA/PCIe card

x16

ROG Rampage II Extreme

2-25