Great ! PCIe x8 HHHL SSD cards

PCIe x8 Gen3 pcie 4 0 in pcie 3 0 slot AU Viewer MSI B550 & AMD Ryzen Deal: PCCGEdge3700XDeal MSI B550 pcie 3 slot Biostar ; 1, 1 x AMD Socket AM4 CPU ; 2, 4 x DIMM DDR4-4933+ ; 3, 4 x SATA III Connectors ; 4, 1 x PCIe x4 Slots ; 5, 1 x PCIe x4 Slots

pcie x16 expansion slot As Zef said, PCI-e is backwards compatible You can put a PCI-e GPU into a slot or a PCI-e GPU into a slot, it'll just run