Asus Z8PH-D12 SE/QDR - Manual (Page 48)

2-30 Chapter 2: Hardware information
2.7.2 Internal connectors
1. Serial ATA connectors (7-pin SATA1, SATA2, SATA3, SATA4)
Supported by the Intel ® ICH10R chipset, these connectors are for the Serial
ATA signal cables for Serial ATA hard disk drives that allows up to 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.