Installing 980 pro into PCIe x8

Installing 980 pro into PCIe x8 pcie 8x slot PCIe slot pcie 4 m2 in pcie 3 slot The PCIe x8 Gen3 backplane supports a PCIe Gen3 target cable adapter installed in the OSS target slot and up to one or more PCIe x16 expansion cards

pcie 4 m2 in pcie 3 slot 3pcs 98pin PCIe X8 Socket for Desktop Motherboard Slot Pin number: 98pin Quantity: 3pcs

pcie 30 x1 slot hdx card in PCI-Express x8 card slot Pro Tools HDX & HD Native Systems The PCIe x8 Gen3 backplane supports a PCIe Gen3 target cable adapter installed in the OSS target slot and up to one or more PCIe x16 expansion cards