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ASUS SABERTOOTH Z77
2-13
Chapter 2
• In single VGA card mode, use the PCIe 3.0 x16_1 slot (beige) 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_2 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 2-24 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 2-22 for details.
IRQ assignments for this motherboard
A B C D E F G H
PCIEX16_1 shared – – – – – – –
PCIEX16_2 shared – – – – – – –
PCIEX16_3 – shared – – – – – –
PCIEX1_1 – shared – – – – – –
PCIEX1_2 – – shared – – – – –
PCIEX1_3 – – – shared – – – –
Intel SATA – – – shared – – – –
USB 2.0 #0 – – – – – – – shared
USB 2.0 #1 shared – – – – – – –
USB 3.0 shared – – – – – – –
HD Audio – – – – – – shared –
Intel LAN – – – – shared – – –
ASM USB 3.0 shared – – – – – – –
ASM1061 #0 – – shared – – – – –
ASM1061 #1 – – – shared – – – –
PCIe x16_3 conguration
PCIE x16_3
Conguration
PCI Express sharing mode
PCIE x16_3 PCIE x1_1 PCIE x1_2 PCIE x1_3
x1 mode x1 x1 x1 x1
x4 mode* x4 N/A N/A N/A
Refer to
3.5.6 Onboard Devices Conguration
for details.