What does x4 bandwidth mean on a PCIe x16 slot?

What does x4 bandwidth mean on a PCIe x16 slot? pcie 2 slot Pretty much, its a 16x slot that runs at 4x electrically which means its going to have 14 the bandwidth You are going to lose a lot of pcie x 16 slot In ASUS 「PCIe x16 Slots - 2」

pcie x 16 slot In ASUS 「PCIe x16 Slots - 2」

pcie x1 in x16 slot The slot format used by both PCI Express and PCI Express is the x16 PCIe slot However, PCI Express slots are subjected to PCIe slots allow your motherboard to connect with your PC's most critical components and provide key functionality