How to determine from command line if NVMe slot is gen 3 or gen 4?

Lenovo ThinkSystem SR650 V3 Server Product Guide > Lenovo Press m 2 gen 4 in gen 3 slot MSI PRO H610M-S DDR4 Motherboard, Micro-ATX m2 slot screw The 6Gbps SATA III spec was finalized in the days when rotational hard drives still ruled and SSDs were rare, ludicrously expensive, and

m2 pcie 40 in 30 slot Boost your tech experience with the ASUS Hyper x16 Gen 4 Card Unleash next-level speeds and versatility for your NVMe drives