Asus P9D WS - Manual (Page 29)

ASUS P9D WS 2-11
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 or dual at x8/x8 mode)
2 PCIe 2.0 x1_1 slot
3 PCIe 3.0 x16_2 slot (single at x8 or dual at x4/x4 mode)
4 PCI1 slot
5 PCIe 3.0 x16_3 slot (x4 mode)
6 PCI2 slot
7 PCIe 2.0 x16_4 slot (x4 mode)
PCIE x16_1 auto turn to x8 when PCIE x16_2 and PCIE x16_3 occupied; PCIE x16_2 auto
turn to x4 when PCIE x16_3 occupied.