Monoprice 108775 18-Inch SATA Serial ATA Cable While parallel data transfers are theoretically faster than serial transfers the older Parallel ATA (PATA) was limited to a maximum data transfer rate of 133 Mbps As an added bonus the smaller connectors and thinner cables made it far easier to route and connect cables within a computer case turning This 18" internal SATA cable is certified for 1.5 Gbps speeds and is suitable for connection to hard drives optical drives and other internal SATA 1.5 Gbps devices