Asus SABERTOOTH 990FX/GEN3 R2.0 - Manual (Page 38)

1-24 Chapter 1: Product introduction
Chapter 1
• 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_3 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_3/PCIe 3.0 x16_4 slots for
PCI Express x16 graphic cards to get better performance.
• We recommend that you provide sufficient power when running CrossFireX™ or SLI™
mode.
• 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
PCIe x16_1 shared – – – – – – –
PCIe x16_2 shared – – – – – – –
PCIe x16_3 shared – – – – – – –
PCIe x16_4 – – – – shared – – –
PCIe x1_1 – – – – shared – – –
ASM eSATA – – – – shared – – –
ASM SATA [Gray] – – – – – – shared –
ASM USB3_12 – – – – – – shared –
ASM 1042 (Front) – – – – – – – shared
ASM USB3_3 shared – – – – – – –
Realtek 8111F (LAN) – – – – – shared – –
Onchip SATA [Brown] – – – shared – – – –
Onchip Audio shared – – – – – – –
Onchip USB2_1-5 – shared – – – – – –
Onchip USB2_6-8 – – – – – shared – –
Onchip USB2_11-14 – – – – – – – shared
VGA
configuration
PCI Express operating mode
PCIe
3.0_x16_1
PCIe
2.0_x16_2
PCIe
3.0x16_3
PCIe
3.0x16_4
Single or Dual
VGA/PCIe card
x16
(Recommend for
single VGA)
x16 x16 N/A
3-way SLI x16 x16 x8 x8