Asus P9D-V - Manual (Page 44)

2-26 Chapter 2: Hardware information
2.8.2 Internal connectors
1. Serial ATA 6.0/3.0 Gbps connectors
(7-pin SATA 6Gbps_1-4 connector [Light Blue])
(7-pin SATA 3Gbps_5-6 connector [Black])
Supported by the Intel
® C224 chipset, these connectors are for the Serial ATA signal
cables for Serial ATA hard disk drives that allows up to 6Gb/s or 3Gb/s of data transfer
rate.
If you installed Serial ATA hard disk drives, you can create a RAID 0, RAID 1, RAID 10,
or RAID 5 configuration.
The actual data transfer rate depends on the speed of Serial ATA hard disks installed.