Asus SABERTOOTH 990FX, User Manual, Page: 34 / 148

2-16 Chapter 2: Hardware information
Chapter 2
• In single VGA card mode, use the PCIe 2.0 x16_1 slot (beige) for a PCI Express x16
graphics card to get better performance.
• In CrossFireX™ or SLI™ mode, use the PCIe 2.0 x16_1 and PCIe 2.0 x16_3 slots for
PCI Express x16 graphics cards to get better performance.
• In 3-way SLI mode, use the PCIe 2.0 x16_1/PCIe 2.0 x16_3/PCIe 2.0 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.
VGA configuration
PCI Express operating mode
PCIe 2.0 x16_1 PCIe 2.0x16_2 PCIe 2.0x16_3 PCIe 2.0x16_4
Single VGA/PCIe card
x16
(Recommend
for single VGA)
N/A N/A N/A
Dual VGA/PCIe card x16 N/A x16 N/A
3-way SLI x16 N/A x8 x8