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ASUS P9X79 PRO 2-15
Chapter 2
• In single VGA card mode, use the PCIe 3.0 x16_1 slot (navy blue) for a PCI Express
x16 graphics card to get better performance.
• In CrossFireX™ or SLI™ mode, use the PCIe 3.0 x16_1 and PCIe 3.0 x16_4 slots for
PCI Express x16 graphics cards to get better performance.
• In 3-way SLI™ mode, use the PCIe 3.0 x16_1, PCIe 3.0 x16_2 and PCIe 3.0 x16_4
slots for PCI Express x16 graphics cards to get better performance.
• We recommend that you provide sufcient power when running CrossFireX™ or SLI™
mode. Refer to page 2-31 for details.
• Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2 when using
multiple graphics cards for better thermal environment. See page 2-30 for details.
IRQ assignments for this motherboard
A B C D E F G H
Intel PCH SATA
Controller #0
– – – – shared – – –
SMBUS Controller – shared – – – – –
On Chip USB #1 – – – – – – – shared
On Chip USB #2 – – – – – – – shared
PCIE x16_1 shared – – – – – – –
PCIE x1_1 shared – – – – – – –
ASM 1042 USB3.0 #1 – – shared – – – – –
ASM 1042 USB3.0 #2 – – – shared – – – –
ASM 1061 E-SATA – shared – – – – – –
Intel 82579V LAN – – shared – – – – –
HD Audio – – – – – – shared –
Marvell 9128 Hardware
RAID Controller
– – – shared – – – –
PCIE x16_2 shared – - – – – – –
PCIE x16_3 shared – – – – – – –
PCIE x16_4 shared – – – – – – –
PCIE x 1_2 shared – – – – – – –