Pci Express X16 Slots - Asus F2A55-M LE User Manual

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 1-24 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
PCIEx16_1
PCIEx16_2
PCIEx1_1
PCI1 slot
Realtek LAN controller
HD audio
SATA controller
On Chip XHCI controller1
On Chip XHCI controller2
On Chip USB EHCI 1/2/3
On Chip USB OHCI 1/2/3/4
ASUS F2A55-M LE
PCI Express operating mode
PCIe x16_1
x16 (Recommended for single VGA card)
x16
A B
– – shared
shared –
shared –
– –
– shared
shared –
– –
– – shared
– shared
– shared
– – shared
PCIe x16_2
N/A
x4
C D E
– –
– – –
– – –
– – shared
– – –
– – –
– shared –
– –
– – –
– – –
– –
F G H
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – –
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