3 interrupt assignments, 4 pci express x16 slot (x16 link), 5 pci express x8 slot (x8 link) – Asus Z9NR-D12 User Manual
Page 36: 6 pci express x8 slot (x4 link), 7 pci express x4 slot (x2 link), 8 pci express x4 slot (x1 link), Interrupt assignments -16, Pci express x16 slot (x16 link) -16, Pci express x8 slot (x8 link) -16, Pci express x8 slot (x4 link) -16

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