Samsung Spinpoint M8 HN-M320MBB 320 GB SATA2 5400rpm 8 MB Cache 320 GB 2.5-Inch Hard Drive Interface: SATA 3.0 Gbps Buffer DRAM Size: 8 MB Rotational Speed: 5,400 RPM Capacity: 320GB Average Seek time(typical): 12 ms 320 GB 5400 RPM 9.5 mm height