Constellation ES ST1000NM0011 1 TB Internal Hard Drive Storage Capacity:1 TB. Maximum External Data Transfer Rate: 600 MBps (4.7 Gbps). Rotational Speed: 7200 rpm. Buffer: 64 MB. Average Seek Time: 9.50 ms. Average Latency: 4.16 ms. Host Interface: Not Applicable. Hard Drive Interface: SATA/600. SATA Pin: 7-pin. Form Factor: Internal. Drive Width: 3.5". Height: 1". Width: 4". Depth: 5.8".