Clarification on GPU bandwidth in relation to PCI Express slots

How to check how many lanes are used by the PCIe card? pcie slot width The third slot is physically an x16 slot, but only 4 lanes are connected Hence “negotiable link width x4, x1” pcie 20 x1 slot Typical PCIe connectors take the form of expansion slots on the motherboard, allowing you to physically attach a supported device PCIE 4 x16 Slot A typical

pcie 4 card in pcie 3 slot Width, Number of Pins, Length PCI Express x1, 18, 25 mm PCI For example, a PCIe x1 card will fit in any PCIe x4, PCIe x8, or PCIe x16 slot