CPU: 1 x PCIe 5.0 x16 (PCIE1), supports x16 mode* 1 x PCIe 4.0 x16 (PCIE3), supports x4 mode* Chipset: 1 x PCIe 4.0 x16 (PCIE2), supports x1 mode* 1 x PCIe 4.0 x16