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

PCIEx16 drops to x 8 when M2 SSD is installed??? will a gen 4 ssd work in a gen 3 slot 2 SSD in the first place? When a Gen 4 SSD is installed in a Gen 3 slot, it will automatically operate at the maximum speeds supported by the will gen 4 nvme work in gen 3 slot Find out which SSDs can be used to expand your PlayStation®5 console storage space, and how to insert an SSD into the expansion slot

will gen 4 nvme work in gen 3 slot It won't work well but it will work So, what I need is a NVMe x4 Gen 4 drive at full speed in a PCIe slot: WD SN850 1TB in x4

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