SATA Revision 3.0 Locking Data Cables
Used for connecting Hard Drives and DVD Rom Drives to the motherboard.
SATA revision 3 doubles the speed of the current 3GB/s version reaching transfer speeds of 6GB/s. The speed ratings of the different versions of Serial ATA are;
•SATA Revision 1 - 1.5GB/s
•SATA Revision 2 - 3GB/s
•SATA Revision 3 - 6GB/s
The different versions of SATA are backwards compatible.