Asus P9D-MV - Manual (Page 40)

2-20 Chapter 2: Hardware information
2.5.4 PCI Express x16 slot (x8 link)
The onboard PCIE 6 provides one x16 Gen3 link to CPU1. This slot supports VGA
cards and various server class high performance add-on cards.
2.5.5 PCI Express x8 slot (x4 link)
The onboard PCIE 5 and the PCIE 7 provides one x4 Gen3 link to CPU1. The
onboard PCIE 4 provides one x4 Gen2 link to CPU1. These slots support VGA
cards and various server class high performance add-on cards.
No.(Slot location) Short Description
1 PCIE4 1 x PCI-E x8 (x4 Gen 2 link)
2 PCIE5 1 x PCI-E x8 (x4 Gen 3 link)
3 PCIE6 1 x PCI-E x16 (x8 Gen 3 link)
4 PCIE7 1 x PCI-E x8 (x4 Gen 3 link)