PCI vs PCIe: What's the Difference and How to Distinguish Them?

File:Pci Express pci slot 1 1 lspci -vmm shows PhySlot for some of the devices You are on your own determining if the slots are numbered from 0 or 1 :) pcie 4 gpu in pcie 3 slot PCIe slots differ depending on which form factor it accepts The longest would be the 16-lane slot and, the shortest is for the 1-lane slots PCI and PCIe slots

pcie x16 expansion slot +1 Also cards must support being inserted into a smaller slot than they're designed for Some slots