4 x 4 slot ✓ x4 slot

4 x 4 slot
4x4 to 4-Bays 4-Disks Expansion Card NVMe Solid State Drive 2242 2260 2280 SSD PCIe X16 Gen 4 Adapter Card4 x 4 slot PCIe Gen 4 doubles the data rate of PCIe Gen 3, allowing PCIe Gen 4 devices to transfer data at much faster speeds

4 x 4 slotX, X, ✓, ✓, ✓ A520, X, X, X, X, X, ✓, ✓, ✓ X470, ✓, ✓, ✓, ✓, ✓, ✓, ✓, ✓ B450, X, X, X 4, 49, 2, 1x16, 1x4, PCIe®, 2424, No B550, 14, 69, 8, 1x16 2x8

4 x 4 slot 4 Expansion Cards: Some expansion cards, such as those for additional USB ports or specialized processing tasks, may also use the X4 interface