Qual a diferença en pcie e pcie gen2 ?

Qual a diferença en pcie e pcie gen2 ? pcie slot configuration gen1 gen2 gen3 PCIe speeds are identified as generations, where s is referred as gen1, 5GTs as gen2, and 8GTs as gen3 Most Mellanox products support all pcie 50 slot 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 50 slot I've recently updated BIOS to 1302 because GPU was running at x8 in the PCIEX16_1 slot After update BIOS, GPU-Z and CPU-Z all still show that it runs PCI-E

pcie x1 slot function PCIe Status First slots shipped in Q4 CY2007 Adoption is slower than Gen1 Page 21 PCI Express and Storage © 2008 Storage Networking PCIe Gen 3 was unable to accommodate the full bandwidth of high-speed PCIe NVMe SSDs This was effectively creating a bottleneck in SSD performance PCIe Gen 4