Amazon.com: 10Gtek PCIe SATA Card 4 Port with 4 SATA Cables and Low Profile Bracket, 6Gbps SATA3.0 Controller PCI Express Expansion Card, X2, Support 4 SATA 3.0 Devices : Electronics
M.2 & PCIe Lane Configurations for B550 Unify / Unify-X
PCIe SATA Adapter Card with 6 Port SATA III 6Gbps, PCI-Express 3.0 X2 Bandwidth