Asus S1-AT5NM10E User Manual page 38

3. SATA power connector (5-pin HDD_PWR)
Connect the supplied SATA power cable splitter to this connector to power
one optical disk drive and one hard disk drive.
AT5I0N3L SATA power connector
3-6
HDD_PWR
+5V
GND
+3V
AT5I0N3L
GND
+12V
Chapter 3: Motherboard info