This SAS cable can be used to connect internal devices, e.g. a hard disk with SATA 7pin connector to a controller with Slim SAS SFF-8654 4i connector. 1.Smaller size connector and cable saves device space 2.Provide four channels signal transmission as per industry standard 3.Data speed: 24Gbps for SAS and 8GT/s for PCIe per channel 4.Meet SAS3.0, Ultraport SlimSAS SFF-8654 specification