Seagate ST9320320AS Momentus 5400.5 SATA 3Gb/s 320 GB Bulk/OEM Hard Drive 5,400 RPM Spin Speed, 8 MB Cache Buffer SATA 3.0Gb/s Interface, 320 GB Capacity Average latency 5.6 msec, Random read seek time 14 msec Best-Fit Applications; Mainstream laptops, External storage solutions/boxes, Whitebooks, Industrial applications requiring a smaller form factor