Samsung's 990 Evo is the world's first hybrid PCIe 4.0 x4 and 5.0 x2 SSD — FrankenSSD has two different interfaces with two different lane widths | Tom's Hardware
Amazon.com: GLOTRENDS SA3026 6 Ports PCIe X4 SATA Expansion Card, Including SATA Cables and 1:5 SATA Splitter Power Cable, Compatible with Windows,Linux,Mac OS,NAS : Electronics