Seagate Momentus 80GB HDD, 80 GB, 4200 RPM, 8 MB, 2.5", Ultra-ATA/100 Seagate Momentus 80GB HDD. HDD capacity: 80 GB, HDD speed: 4200 RPM, Storage drive buffer size: 8 MB, HDD size: 2.5", Interface: Ultra-ATA/100