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ASUS F2A55-M
1-21
• 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 sufcient 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.
VGA conguration
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
1.6.5 PCI Express x16 slots
This motherboard supports two PCI Express x16 graphics cards that comply with the PCI
Express specications.
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
Controller
- - shared - - - - -
AMD FCH USB 2.0
Controller
- -shared - - - - - -
ASMedia USB3.0
Controller
- - shared - - - - -
HD Audio Controller shared - - - - - - -
Onboad VGA - shared - - - - - -