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

PCIEx16 drops to x 8 when M2 SSD is installed??? pciex16 slot PCIe x16 is your 16-lane PCI Express slot, or at least your largestlongest PCI Express slot It is the most high-bandwidth, high-performance expansion slot pciex16 slot Pcie x16 slot into multiple x4 slots · PCIE Bifurcation · IBM 69Y5321 M4 PCIe Gen-III Riser Card 2 · Cablem ATIC

slot nemo 3, you need to set the motherboard BIOS before use, the corresponding slot PCIE maximum connection speed to GEN3 1, PCIE X16 slot split 4 PCIEX4 (physical