There is SATA I/II/III.
with speeds at 1.5/3/6 Gbps
Because of the confusion between SATA 3Gbps/SATA III they are normally marketed by the Gbps.
You would want a SATA III/6Gbps cable, although really any you have should work as cables aren't what determine the speed unless they are really poorly made. But if you have to buy one get one rated for 6Gbps