PCIEx16 drops to x 8 when M2 SSD is installed???

Swappable NVMe M2 PCIe Slot Adapter Dual SSD m2 pcie slot Hi, I currently am using a Pi 5 and I have connected via a Blue USB slot an External SSD enclosure, with an PCIe Gen 4 NVMe SSD in it m2 nvme slot 2 SSD slot, and support for a PCIe NVMe slot is listed as an optional feature for AMD's B650 chipset motherboards Most B650E, X670 and

m2 sata slot The real advantage of the PCIe interface over SATA is the ability to transmit data on up to four lanes, whereas SATA only has one When combined with an NVMe