Asus X99-PRO/USB 3.1 - Page 33

ASUS X99-PRO/USB 3.1
1-17
Chapter 1
• We recommend that you provide sufcient power when running CrossFireX™ or SLI™
mode.
• Connect a chassis fan to the motherboard connector labeled CHA_FAN1-4 when
using multiple graphics cards for better thermal environment.
40-LANE CPU PCI Express 3.0 operating mode
VGA
configuration
PCIe 3.0/2.0 x16_1 PCIe 3.0/2.0 x16_3 PCIe 3.0/2.0 x16_4
Single VGA/
PCIe card
x16 (single VGA
recommended)
N/A N/A
Dual VGA/PCIe
cards
x16 x16 N/A
Triple VGA/
PCIe cards
x16 x16 x8*
28-LANE CPU PCI Express 3.0 operating mode
VGA configuration PCIe 3.0/2.0 x16_1 PCIe 3.0/2.0 x16_3 PCIe 3.0/2.0 x16_4
Single VGA/PCIe card
x16 (single VGA
recommended)
N/A N/A
Dual VGA/PCIe cards x16 x8 N/A
Triple VGA/PCIe cards x16 x8 x4*
* When the M.2 x4 slot is occupied, the PCIe x16_4 slot will be disabled.
• *The 3-Way SLI™ conguration is not supported when using a 28-LANE CPU.
• *When the M.2 x4 slot is occupied, the PCIe x16_4 slot will be disabled.