I’ve tried _everything_, 5 different docks, refresh rates, different displays using different interfaces.

The problem is the vram using full power.

The only solution I’ve found under OSX is using an eGPU. I have both the Core X and the Core X Chroma, and the Chroma works fantastically both as a fully fledged docking station and keeping the output wattage / fans at bay. I’m almost exclusively using my 16” stationary with an external display.

Another solution, albeit expensive, is buying the 16” MBP with the 5600m graphics. That card uses HBM2 memory which uses around a 4th-5th of the wattage of the GDDR6 memory of the 5500m. Around 4w instead of 19w.