How to check the PXIe port is running GEN2 or GEN3?

PCIe Speed - Republic of Gamers Forum pcie slot configuration gen1 gen2 gen3 PCIe is backward compatible with PCIe Gen 1, PCIe Gen 2, and PCIe Gen 3 PCIe Gen 4 will be compatible with PCIe Gen 5 However, a PCIe Gen pcie slot qrelease PCIe supports PCIe Gen 1, PCIe Gen 2, and PCIe Gen 3 devices PCIe With options for 1x, 2x, 4x, 8x, and 16x slot configurations

pcie 4 gpu in pcie 3 slot PCIe Status First slots shipped in Q4 CY2007 Adoption is slower than Gen1 Page 21 PCI Express and Storage © 2008 Storage Networking