This COM header is for COM serial devices.
2.7.11.COM header:COM_A
This SPDIF header is for SPDIF audio devices.
2.7.13.SPDIF header:JSPDIF
This SPEAK header is for Speaker serial devices.
2.7.14.SPEAK header:SPEAK
This 4-pin header is for FAN with LED light.
2.7.12.FAN_RGB_HEADER