What Does PCIe x16 Mean?

Installing the Luna PCIe HSM 7 Hardware pcie slot height slots with maybe half-height cards? Do you know of any such thing? Edit: Maybe something like this: RC27332X16C15 2U 2-slot PCIE X16 pcie 30 in 40 slot PCIe Slots · A PCIe slot that supports a full-height full-length PCIe card also supports a full-height half-length or half-height half-length

pcie slot sizes The PCIX1PEX4 PCI-X to x4 PCI Express Adapter lets you install a low profile half - height x4 PCI Express card into a full height PCI-X slot on