It is an internal Mini Serial Attached SCSI HD x4 (SFF-8643) to Mini Serial Attached SCSI x4 (SFF-8087) cable.
It is used for connecting a SAS/SATA adapter to a SAS/SATA backplane.
The High Density (HD) system referenced as HD Mini-SAS (SFF-8643) in the SAS 2.1 standard, meets the 6Gb/s SAS specification.
These new HD Connectors will be used on the SAS 3.0 specification when it is released. Cable material may change but the connectors will be the next generation of SAS to run at 12Gb/s.
internal HD Mini-SAS Copper Cables
Description
SFF-8643 to U2 Kit NGFF M-Key to HD Mini SAS NVME PCIe SSD SATA Adapter for Mainboard
Supports M.2 modules in format 22110 2280, 2260, 2242 and 2230 with key B or key B+M based on SATA or PCIe
Hyper Kit Storage controller,Ultra PCI-E Card (PCIe 3.0 x4),The card only work for PCI-E SSD.(Not work for SAS or HD Mini SAS HD)
This U.2 M.2 converter enables two different usage applications.
1. One M.2 PCIe SSD in 22110, 2280, 2260, 2242 and 2230 format can be connected and used as a replacement for a 2.5″ HDD. The converter can be installed into the system internally through the SFF-8643 HD Mini interface.
2. One M.2 SATA SSD in 2280, 2260, 2242 and 2230 format can be connected and used as a replacement for a 2.5″ HDD. The converter can be installed into the system internally through the SATA 22pin interface.