HP 739890-B21#0D1, 300 GB, 3.5", 475 MB/s, 6 Gbit/s HP 739890-B21#0D1. SSD capacity: 300 GB, SSD form factor: 3.5", Read speed: 475 MB/s, Write speed: 250 MB/s, Data transfer rate: 6 Gbit/s