2-Ports SFF-8643 to SFF-8644 Adapter with Full PCI Slot Profile Mounting Bracket.. External 8644 to internal 8643 adapter, will work both on the host and device side.. Supports External SFF-8644 Host Connectors.. Supports Internal SFF-8643 Device Connectors. Supports up to 12Gb/s Mini SAS HD Data Transfer Rate