Toshiba 640GB 2.5" SATA. Hard drive capacity: 640 GB, Hard drive size: 63.5 mm (2.5 "), Hard drive rotational speed: 5400 RPM. Power consumption (typical): 4.5 W, Power consumption (standby): 0.18 W, Power consumption (PowerSave): 0.15 W. Weight: 102 g, Height: 9.5 mm, Width: 69.85 mm. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -40 - 60 °C, Operating shock: 400 G. Windows operating systems supported: Windows XP, Windows Vista, Windows 7