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

pcie x16 slot, pcie x1 slot, pcie x4 slot, pcie x8 slot, which pcie slot to use, does it

Option 1: 2 PCIe x8 Slots Part Numbers MCP-240-21108-0N RSC-H-68G5 CBL-MCIO-1233M5R CBL-MCIO-1232M5 CBL-PWEX-1136YB-25 Option 2: 1 PCIe x16 Slot Part

pciex16 slot configuration Discrete graphics cards—such as an Intel® Arc™ A-series GPU—are large, powerful components that plug into the PCIe x16 slot on your PC's motherboard

da vinci extreme slot Firebox T30 - interface configuration Jun 6th 2024 Maxsun Puts the PCIe x16 Slot on the Back of its Latest B760 Mini-ITX Motherboard