Supports up to 12Gb/s Mini SAS HD Data Transfer Rate. With Lowe Profile and Standard Profile bracket. CY Mini SAS SFF-8088 To Internal SAS HD SFF-8643 PCBA Female Adapter Dual Ports With Low Profile Bracket The High Density (HD) system referenced as HD Mini-SAS (SFF-8643) in the SAS 2.1 standard, meets the 12Gb/s SAS specification. External 8088 to internal 8643 adapter, will work both on the host and device side.