OPNSense - How to optimise power and temperatures ( BKIPC Topton Intel N100 i226-V )

Topton sell a unit ideal for OPNSense. Based off an Intel N100, with an Intel i226 4 port 2.5GbE switch, HDMI, DisplayPort, NVMe and 6 USB.. it's ideal. But unfortunately, it runs hot.

Here's how to lower the power usage (and temperature) given the box uses only 5-10% of CPU utilisation for OPNSense...