Compaq 80.0GB (5400RPM) SATA Hard drive (80-pin SCA Connector)For Presario C300 Series - ST98823ASNote: This hard drive does not include the caddy or the connector. Hard drive caddies and connectors are sold separately. Form Factor: 2.5" x 1/8H Dimensions (WxDxH): 2.8 in x 3.9 in x 0.4 in Capacity: 80 GB Interface Type: Serial ATA-150 Connector: 80-pin SCA connector (Seagate Cheetah) Data Transfer Rate: 150 MBps Average Seek Time: 12.5 ms Rotational Speed: 5400 rpm Compatible Models:Presario C300, Presario C303, Presario C303NR, Presario C304, Presario C304NR,Presario C306,