Western Digital Caviar Green 500GB. Hard drive capacity: 500 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: Variable. Power consumption (typical): 3.9 W, Power consumption (standby): 1.1 W, Start-up current: 1.775 A. Weight: 0.73 kg, Height: 25.4 mm, Width: 101.6 mm. Operating temperature range (T-T): 0 - 60 °C, Storage temperature range (T-T): -40 - 70 °C, Operating shock: 65 G