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

That's because few games ever saturate the 32GBps of data today's x16 PCIe slot can carry 2 1TB PCIe SSD Gigabyte Aorus NVMe Gen4 M

2 Slot is from the Ryzen 7 5700G then it will only support PCIe Found this tech site that explains that a Motherboard can have both PCIe and slots:

m24 slot wallet x16, 1 PCIe x16, 1 PCIe x1, 1 Key E for Besides the onboard LAN port, users may also choose wireless connections by slot

m2 pcie 40 in 30 slot A PCIe slot, for example, features an 8 GTs transfer rate per lane, whereas a PCIe slot possesses a 16 GTs transfer rate per lane 2