High CPU usage on xorg when the external monitor is plugged in

This is not solution, when I switched to Nvidia Performance mode it caused to generate more power and heat so it triggered fan to rump up very loud. I looked into temps monitor nvidia-smi the Nvidia used about 30watt power constantly even I just move around cursor this was caused more heat and fan ramping up so out loud,
I will not install any Linux on Hybrid laptop so I will stick on Windows due to Driver software problems on Linux, I’ve been waiting for this about 1 year nothing seemed to fix I just gave up not to try another solution I will get rid Linux on my entire drive.

Another month gone by, and still no response from nVidia AT ALL. This serious issue has been around for 1.5 YEARS. Laptop can only function using the built-in display, what a farce.