Asus WS C246M PRO Manual page 37

14. Serial General Purpose Input/Output connector (6-1 pin SGPIO1)
The SGPIO1 connector is used for the Intel Rapid Storage Technology Enterprise
SGPIO interface that controls the LED pattern generation, device information, and
general purpose data.
15. Power Supply SMBus connector (5-pin PSUSMB1)
This connector allows you to connect SMBus (System Management Bus) to the PSU
(power supply unit) to read PSU information. Devices communicate with an SMBus
host and/or other SMBus devices using the SMBus interface.
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