Asus Z9NR-D12 - Manual (Page 37)

ASUS Z9NR-D12 2-17
PCIE 1 1 x PCI-E x 8 (Gen3 x4 link)
PCIE 2 1 x PCI-E x 16 (Gen3 x16 link)
PCIE 3 1 x PCI-E x 8 (Gen3 x8 link)
PCIE 4 1 x PCI-E x 8 (Gen3 x8 link)
PCIE 5 1 x PCI-E x 8 (Gen3 x8 link)
PCIE 6 1 x PCI-E x 4 (Gen3 x2 link)
PCIE 7 1 x PCI-E x 4 (Gen3 x1 link)
2.5.9 PIKE slots
The PIKE slot allows you to choose and change your preferred SAS solution easily.
Install an optional ASUS PIKE RAID card based on your needs.