Asus KCMA-D8 User Manual page 54

6. Serial General Purpose Input/Output connectors (8-1 pin SGPIO1/2)
These connectors are used for the SAS chip SGPIO interface that controls
the LED pattern generation, device information and general purpose data.
These connectors function only when you install an ASUS PIKE SAS RAID
card.
7. Serial General Purpose Input/Output connector (8-1 pin SGPIO3/4)
These connectors are used for the SGPIO peripherals of the PROMISE
RAID SATA LED.
2-36 Chapter 2: Hardware information
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