PCI device address actually means slot address? And when does

PCI vs PCIe FAQs pcie slot meaning The number following the “x” represents how many lanes are on that slot PCIe lanes serve as the physical link between the device and the pcie slot height PCIe bifurcation is no different to the definition dividing the PCIe slot in smaller chunksbranches Example, a PCIe x8 card slot

pcie 4 m2 in pcie 3 slot PCI Express x16 — Sixteen lanes, largest slot *some slots may not have matching lanes in bandwidth, more on this throughout the article