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

The top slot which my older gen 3 drive is in is the one that has dedicated PCIE lanes direct to the CPU from the NVME slot though and is the

Note using sudo is needed to get the verbose information 1 Get the generation of the attached device $ sudo lspci -vv -s 08: grep -w

which slot is for detergent 2 slots I'm looking to add 2 pcie gen 4 nvme SSDs I assume one drive will use one of the x16 lanes And the graphics card

which caliper is used to measure the width of the slot If you see the board physically , you will see that slot B is too short for a typical NVMe SSD So even if you get