Asus Z9PA-U8 - Manual (Page 50)

2-30 Chapter 2: Hardware information
1. Serial ATA 6.0/3.0 Gb/s connectors
(7-pin SATA6G_1-2 [light blue])
(7-pin SATA3G_3-6 [black])
Supported by the Intel
® C602-A Chipset, these connectors are for the Serial
ATA signal cables for Serial ATA hard disk drives that allows up to 6Gb/s of
data transfer rate.
2.8.2 Internal connectors
The actual data transfer rate depends on the speed of Serial ATA hard disks
installed.