U.2 U2 SFF-8639 to Slimline SFF-8654 4i NVME PCIe SSD Cable for Mainboard SSD 750 p3600 p3700 M.2. Length:50cm. for Mainboard Intel SSD 750 M.2 SFF-8654 Ultraport Slimline. Ultraport Slimline SAS 4i plug to U.2 SFF-8639 Port. Data speed: 24Gbps for SAS and 8GT/s for PCIe per channel. This cable can be used to connect internal devices, e.g. a device with SFF-8639 connector to a controller with Slimline SFF-8654 4i connector. The Cable only support PCI-E, not support SAS raid card. Cable only, the adapter / card not included.