Asus RS726Q-E7/RS12 - Manual (Page 62)

4-10 Chapter 4: Motherboard information
4.3 Internal connectors
1. Serial ATA connectors (7-pin SATA1-2 [Light blue], SATA3–4 [Black])
(SATA 6Gb/s: 7-pin SATA1-2 [Light blue])
(SATA 3Gb/s: 7-pin SATA3-4 [Black])
These connectors, controlled by Intel
® C602 chipset, are for the Serial ATA
signal cables for Serial ATA hard disk drives.
The actual data transfer rate depends on the speed of Serial ATA hard disks
installed.