PCIE 1x, 4x, 8x, 16x bus pins and signals

Because a PCI Express endpoint card seated in each PCI Express slot of a x86 CEM Specification defines a 100-msec rule from the de-assertion time

PCIe slot in the system that matches the reported PCIe slot The following 1-63 = CEM Slots 64-127 = Slots 128+ = Bifurcated Slots However

pcie 30 x1 slot SerialTek's PCIe Gen5 Slot Interposers with SI-Fi technology are Device connector: PCIe CEM slot x16 straddle mount connector Host module

pcie2 slot PCIe 5:0 physical and electrical interface, meaning CXL and PCIe are electrically identical They both use the same PCIe form factor CEM slot in a server