9000 & 7000 CPUs: 2 x PCIe 5.0 x16 (x16 or x8/x8 or x8/x4/x4 modes) 8700 & 8600 & 8400 CPUs: 2 x PCIe 4.0 x16 (supports PCIEx16_1 & total bandwidth for x8, PCIEx16_