1.6.5PCI Express x16 slots

This motherboard supports two PCI Express x16 graphics cards that comply with the PCI Express specifications.

VGA configuration

PCI Express operating mode

 

PCIe x16_1

PCIe x16_2

 

Single VGA/PCIe card

x16 (Recommended for single VGA card)

N/A

Dual VGA/PCIe card

x16

x4

•In single VGA card mode, use the PCIe 2.0 x16_1 slot (blue) for a PCI Express x16 graphics card to get better performance.

•We recommend that you provide sufficient power when running CrossFireX™ mode.

See page 1-26 for details.

•Connect a chassis fan to the motherboard connector labeled CHA_FAN when using multiple graphics cards for better thermal environment.

IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

PCIe x16_1

-

-

shared

-

-

-

-

-

PCIe x16_2

shared

-

-

-

-

-

-

-

PCIe x1_1

shared

-

-

-

-

-

-

-

PCI slot

-

-

-

-

shared

-

-

-

AMD FCH SATA Controller

-

-

-

shared

-

-

-

-

AMD FCH USB 1.1

-

-

shared

-

-

-

-

-

Controller

 

 

 

 

 

 

 

 

AMD FCH USB 2.0

-

-shared

-

-

-

-

-

-

Controller

 

 

 

 

 

 

 

 

ASMedia USB3.0

-

-

shared

-

-

-

-

-

Controller

 

 

 

 

 

 

 

 

HD Audio Controller

shared

-

-

-

-

-

-

-

Onboad VGA

-

shared

-

-

-

-

-

-

ASUS F2A55-M

1-21