Supports up to 12Gb/s Mini SAS HD Data Transfer Rate. With Lowe Profile and Standard Profile bracket. CY Mini SAS HD SFF-8644 To Internal Mini SAS SFF-8087 PCBA Female Adapter Dual Ports With Low Profile Bracket The High Density (HD) system referenced as HD Mini-SAS (SFF-8644) in the SAS 2.1 standard, meets the 12Gb/s SAS specification. External 8644 to internal 8087 adapter, will work both on the host and device side.