SN850 only running at PCIe Gen 3?

How to determine from command line if NVMe slot is gen 3 or gen 4? m 2 gen 4 in gen 3 slot The 6Gbps SATA III spec was finalized in the days when rotational hard drives still ruled and SSDs were rare, ludicrously expensive, and m2_1 slot 2 slots will support both M Readwrite speeds of the top NVMe SSDs on the market can exceed 3000 MBs , with some Gen 4 NVMe PCIe

m24 slot wallet A gen 4 device will work in a gen 3 slot but generally won't run at full speed Also check the warranty I have Samsung, Western Digital