gen4d slot

as far as available PCIe slots on the motherboard (x1, x4 etc Gen3/Gen4) that is irrelevant, since 99% of AM4 motherboards come with 1, 2 or even more M.2 slots, which will be PCIe X4 Gen 3/4 (depending on the capabilities of the motherboard) - I have four AM4 boards with an M.2 Gen3 x4, and one with M.2 Gen4 x4 - all my NVMe drives are Gen4 x4 and all work anywhere, due to the backwards ... holy 666 slot