Table of Contents
1.6.5
PCI Express x16 slots
This motherboard supports two PCI Express x16 graphics cards that comply with the PCI
Express specifications.
VGA configuration
Single VGA/PCIe card
Dual VGA/PCIe card
•
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
PCIe x16_1
PCIe x16_2
PCIe x1_1
PCI slot
AMD FCH SATA Controller
AMD FCH USB 1.1
Controller
AMD FCH USB 2.0
Controller
ASMedia USB3.0
Controller
HD Audio Controller
Onboad VGA
ASUS F2A55-M
PCI Express operating mode
PCIe x16_1
x16 (Recommended for single VGA card)
x16
A
B
C
-
-
shared
shared
-
shared
-
-
-
-
-
-
-
shared
-
-shared
-
-
shared
shared
-
-
shared
PCIe x16_2
N/A
x4
D
E
-
-
-
-
-
-
-
-
-
-
shared
-
shared
-
-
-
-
-
-
-
-
-
-
-
-
-
-
F
G
H
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1-21
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