The difference between PCIe x1, x4, x8, x16 and x32

PCI-e 1x slot That's fine, but how do I relate these outputs to deduce what PCI type and version are the free slots in my server? I

So, there is no singular PCI Express slot There are actually four sizes : PCI Express x1, PCI Express x4, PCI Express x8, and PCI Express x16

pcie expansion slot Supermicro You could look at something like the C9Z390-series which have four x16 physical slots and

pciex4 slot The Matrox PCI and PCIe technology guide explores the importance of evaluating different slot types when buying add-in graphics cards