Seagate Momentus 7200.4 SATA 3Gb/s 320 GB, Momentus. Hard drive interface: Serial ATA, Hard drive capacity: 320 GB, Hard drive speed: 7200 RPM. Weight: 110g. Dimensions (WxDxH): 69.85 x 100.35 x 9.5 mm, Data transfer rate (max): 3000 Mbit/s, Recording density: 1490 kbit/inch