Seagate Barracuda ES 320GB, 7200rpm, SATA-II, Barracuda. Hard drive capacity: 320 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: 7200 RPM. Power consumption (typical): 15 W. Weight: 720 g, Height: 26.11 mm, Width: 101.6 mm. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -40 - 70 °C, Operating altitude: -60.96 - 3048 m