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

can i put a gen 4 m 2 in a gen 3 slot
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Two types of PCIe slot on an Asus H81M-K motherboard Various slots on a computer motherboard, from top to bottom: PCI Express x4; PCI Express x16; PCI Express

Practically if you want the fastest drive, match the generation of your slot with the drive (so if you have a PCIe gen 4, get a gen 4 compatible

can you order lottery tickets online Eight NVMe SSD slots on a PCIe x16 card Silent operation Add your own ultra-fast SSDs for Mac, Windows, and Linux

canyonlands slot canyons And, I also tested the performance gain when connect PCIe gen 4 onto gen3 The gen