Asus P7P55D-E PRO - Manual (Page 52)

2-34 Chapter 2: Hardware information
Chapter 2
4. JMicron ® JMB363 Serial ATA connectors (7-pin SATA_E1 [black])
This connector is for a Serial ATA signal cable for a Serial ATA hard disk drive or optical
drive.
To enable hot-plugging, set the J-Micron Controller item in the BIOS setting to [AHCI
Mode], and then reboot the system. See section 3.6.3 Onboard Device Configuration for
details.
5. IEEE 1394a port connector (10-1 pin IE1394_2)
This connector is for an IEEE 1394a port. Connect the IEEE 1394a module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
Never connect a USB cable to the IEEE 1394a connector. Doing so will damage the
motherboard!
The IEEE 1394a module is purchased separately.