Iomega UltraMax Desktop Hard Drive. Hard drive capacity: 640 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 2.0, FireWire 800. Weight: 2280 g, Width: 122 mm, Depth: 245 mm. Data transfer rate (max): 800 Mbit/s, Minimum processor: 300 MHz / G3