With 10 Power Phase design, ASRock Z390 Pro4 Supports 9th and 8th Gen Intel Core processors, up to 64GB DDR4-4300+ memory. Equipped dual Ultra M.2 supports both SATA3 6Gb/s and PCIe Gen3 x4 that pushes data transfer speeds up to 32Gb/s, and is compatible with ASRock’s U.2 Kit for installing some of the world’s fastest U.2 PCIe Gen3 x4 SSD.