Samsung 320GB Serial ATA II HDD, Spinpoint T. Hard drive capacity: 320 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: 7200 RPM. Power consumption (typical): 8 W. Operating temperature range (T-T): 0 - 60 °C, Storage temperature range (T-T): -40 - 70 °C, Operating relative humidity range: 5 - 90 %