Asus P9X79 PRO - Manual (Page 34)

2-14 Chapter 2: Hardware information
Chapter 2
2.2.4 Expansion slots
Ensure to unplug the power cord before adding or removing expansion cards. Failure to do
so may cause you physical injury and damage motherboard components.
Slot No. Slot Description
1 PCIe 3.0 x16_1 slot (single at x16)
2 PCIe 2.0 x1_1 slot
3 PCIe 3.0 x16_2 slot (triple at x16 / x8 / x8 mode)
4 PCIe 3.0 x16_3 slot (at x8 mode)
5 PCIe 3.0 x16_4 slot (dual at x16 / x16 mode)
6 PCIe 2.0 x1_2 slot
VGA configuration
PCI Express operating mode
PCIe x16_1 PCIe x16_2 PCIe x16_3 PCIe x16_4
Single VGA/PCIe card
x16
(Recommend
for single VGA)
N/A N/A N/A
Dual VGA/PCIe card x16 N/A N/A x16
Triple VGA/PCIe card x16 x8 N/A x8