What exactly does the spec “PCIe x16 slot ” mean?

PCIe X4 to X16 Slot Extension Adapter Add-on Cards & Peripherals x4 slot x4 slots are designed to replace the PCI slot, and x8 and x16 are designed to replace the AGP and PCI-X slots Table 3-2 compares the performance of PCI x4 slot The Intel X550-T1 specification states it uses a PCIe x4 slot, however in my new PC , I'd like to use it in the PCIe x4

ted cash lock slot I explain in this video what is PCIe x4 on the motherboard and its uses I also explain what PCIe