Use this cable to connect a U. 2 port (SFF-8639) to a mini SAS HD (SFF-8643) connector. U. 2 Ports come in M. 2 Adapters that use M-key (NVMe). Please Update to add native driver support in NVM Express in Windows 7 and Windows Server 2008 R2 Windows 10 comes with those drivers preinstalled.