H310 motherboard layout details
H310 motherboard layout details
Yes, it appears as a 5V Argb header positioned above the PCIe lane.
It appears to be a serial port header. The text above suggests UART1 with a video link for reference. It seems likely this is for connecting to a serial port to flash BIOS or debug the motherboard. Most likely, the pins correspond to GND, TX, and RX. Given its proximity to the audio chip, it might be an undocumented SPDIF or digital output header—typically 5V, unused, data, or ground. Verify the header details directly from the documentation for confirmation.