Seagate Central Axis 1TB, Maxtor. Total storage capacity: 1000 GB, Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM. Networking features: Gigabit Ethernet. Weight: 0.68 kg. Minimum processor: Pentium III, 500 MHz, Minimum RAM: 128 MB, Compatible operating systems: Microsoft Windows XP, Vista Mac OS X 10.4.11 +. Dimensions (WxDxH): 63.3 x 150.3 x 172 mm