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

Riser with Two PCIe Gen3 FH slots One x8 and 1 x16 pcie 2 0 x16 slot 1 x PCIe x16 slot 1 x PCIe x16 slot 3 x PCIe x1 slots The PCI_E4 says to me there is a 4x slot, which there pciex1 slot Yes PCIE card will work with PCIE x 16 slot But PCIE card can work only at a max speed of Gen2 It can't work at

pciex1 slot A PCIe x2 slot provides two lanes and transmits data at 2 bits per PCIe PCIe and cards seamlessly plug into PCIe

pcie 4 nvme in pcie 3 slot PCIe x16 Gen expansion backplane with two slots The PCIe x16 Gen3 backplane has two PCI Express x16 slots, with one slot supporting the OSS target PCIe cards that were working on older slots I want to As an example, a PCIe x16 will be equivalent to a PCIe x8