2PF9481 - Seagate-IMSourcing Barracuda ES ST3750640NS 750 GB 3.5quot; Internal Hard Drive Buffer - 16 MB Hard_Drive_Interface - SATA/300 Compatible_Drive_Bay_Width - 3.5&quot; Maximum_External_Data_Transfer_Rate - 384 MBps 3 Gbps Maximum_Internal_Data_Transfer_Rate - 129 MBps 1 Gbps