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
•Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2 when using multiple graphics cards for better thermal environment.
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H |
PCIEx16_1 | – | – | shared | – | – | – | – | – |
PCIEx16_2 | shared | – | – | – | – | – | – | – |
PCIEx1_1 | shared | – | – | – | – | – | – | – |
PCIEx1_2 | – | – | – | shared | – | – | – | – |
PCI1 slot | – | – | – | – | shared | – | – | – |
PCI2 slot | – | – | – | – | – | shared | – | – |
PCI3 slot | – | – | – | – | – | – | shared | – |
Realtek 8111F controller | – | – | shared | – | – | – | – | – |
ASM USB3.0 | – | shared | – | – | – | – | – | – |
HD audio | shared | – | – | – | – | – | – | – |
SATA controller | – | – | – | shared | – | – | – | – |
Onboard USB1.0 controller | – | – | shared | – | – | – | – | – |
Onboard USB2.0 controller | – | shared | – | – | – | – | – | – |
ASUS F2A55 |