Is my Samsung 980 PRO NVMe running in PCIe 3 or PCIe 4

Is my Samsung 980 PRO NVMe running in PCIe 3 or PCIe 4 nvme pcie 4 0 in 3 0 slot PCIe devices are forward and backward compatible, therefore a PCIe SSD will still work on a PCIe motherboard and conversely a PCIe SSD would work on nvme 40 in 30 slot Limiting it to PCIe x4 merely halves the maximum bandwidth, so the linear thruput will be lower But very rarely do you have long, linear

nvme 40 in 30 slot A PCIe NVMe SSD will work in a PCIe motherboard slot at PCIe speeds PCI-Express versions are

nvme m2 slot laptop PCIe SSDs are twice as fast as PCIe SSDs But next-generation PCIe SSDs will double PCIe Gen 4 speeds  Xgig CEM-slot, 4-lane Interposer Module for PCI Express The PCIe4, 4 3 NVMe SSD for input to the VIAVI PCIe Analyzer Xgig , 4