Asus P7H55D-M PRO - Manual (Page 47)

ASUS P7H55D-M PRO 2-27
Chapter 2
2. Intel ® H55 Serial ATA connectors (7-pin SATA 1-6)
These connectors connect to Serial ATA hard disk drives and optical disc drives via
Serial ATA signal cables.
You must install Windows ® XP Service Pack 2 or later versions before using Serial ATA hard
disk drives.