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40-LANE CPU
VGA
PCIe 3.0/2.0 x16_1
configuration
Single VGA/
x16 (single VGA
PCIe card
recommended)
Dual VGA/PCIe
cards
Triple VGA/
PCIe cards
* When the M.2 x4 slot is occupied, the PCIe x16_4 slot will be disabled.
28-LANE CPU
VGA configuration
Single VGA/PCIe card
Dual VGA/PCIe cards
Triple VGA/PCIe cards
•
*The 3-Way SLI™ configuration 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.
•
We recommend that you provide sufficient 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.
ASUS X99-PRO/USB 3.1
PCI Express 3.0 operating mode
PCIe 3.0/2.0 x16_3
x16
x16
PCI Express 3.0 operating mode
PCIe 3.0/2.0 x16_1
PCIe 3.0/2.0 x16_3
x16 (single VGA
recommended)
x16
x16
PCIe 3.0/2.0 x16_4
N/A
x16
x16
PCIe 3.0/2.0 x16_4
N/A
x8
x8
N/A
N/A
x8*
N/A
N/A
x4*
1-17
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