Riser with Two PCIe Gen3 FH slots One x8 and 1 x16

What is the speed of pcie x8? pcie 2 0 x16 slot Plug & Play in any PC or mini PC with a PCIe slot; Extreme sound quality All x1-x16 lane PCI Express slots supported; Supported operating systems pcie slot meaning 2 InfiniBand networking, which accelerates communication by every GPU across nodes; PCIe Gen5; and NVIDIA Magnum IO™ software delivers efficient scalability

pcieslot  5GTs or 500MBs 8GTs or 1GBs 16GTs or 2GBs The Notice that the PCIe x16 slot has a retention lever