Pci_e1~e6: pcie expansion slot, Expanson slots -20, Pci_e1, e4, e6 – MSI X79A-GD45 PLUS Manual User Manual

Page 32: Pcie 3.0 x16 expanson slots, Pci_e2, e5, Pcie 2.0 x16 expanson slots, Pci_e3, Pcie 2.0 x1 expanson slot, Expanson slots