Asus P9D-MH/SAS/10G-DUAL - Manual (Page 57)

ASUS P9D-MH Series 2-37
8. Serial General Purpose Input/Output connector (6-1 pin SGPIO1)
The SGPIO 1 connector is used for the Intel Rapid Storage Technology Enterprise
SGPIO interface that controls the LED pattern generation, device information, and
general purpose data.
Serial General Purpose Input/Output connectors (8-1 pin SGPIO2, SGPIO3)
The SGPIO 2 and SGPIO 3 connectors are for the LSI 2308 RAID controller.