DESC: Product Features: Designation: Desktop Computer; Enclosure: Internal; HDD Form Factor: 3.5"; Capacity: 320 GB; Spindle Speed: 7200 RPM; Interface: Serial ATA; Interface (Detailed): Serial ATA; Buffer Size: 8 MB; External Data Transfer Rate: 300 MBps; Seek Time: 8.9 ms; Hot Swap: Yes; Special Features: S.M.A.R.T Technology; MTBF: 600000 Hours; Average Latency: 4.17 ms; Sound Emission: 27 dB; Package Qty.: 1; Height: 1 in.; Depth: 5.75 in.; Width: 4 in.; Weight: 1.13 lb.