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

How to determine from command line if NVMe slot is gen 3 or gen 4? pcie 4 ssd in pcie 3 slot The one on the right is a Samsung SSD that can use up to four PCI Express lanes III and two PCIe lanes The very fastest SSDs tend to pcie 30 x4 slot Acer FA100 1TB NVMe PCIe Gen3 x 4 SSD Capacity: 1 TB; Interface: PCIe Gen3 x4, 2 slot While the

pcie 30 x4 slot PCIe Gen 3 vs PCIe Gen 4 PCIe offers twice the data rate and maximum bandwidth of PCIe , allowing faster data transfers The standard

pcie training error slot 1 You can insert a PCIe SSD card into a motherboard with PCIe slots, but this SSD won't be able to make full use of the higher bandwidth 3 slots to see if there is any performance difference when switch between slots And, I also