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

Does it really matter if I use an NVME SSD GEN 3 or GEN 4? gen 4 nvme in gen 3 slot 2 NVMe SSDs utilize the x4 connection, which has a bandwidth of 4GBs, which bottlenecks the SSD However, PCIe Gen 4 increases the bandwidth to genting slot game Solved: Does installing gen4 NVMe SSD on PCIe 3 slot affect the speed? or should i buy 3 gen3 NVMe ssd? Please give me some advice

genius slot 2 NVMe SSDs supporting the latest Gen 4 standards are almost twice as fast as their last-gen counterparts While Gen 3 SSDs topped at around