GPU not working with iMac 2011 27" / Nvidia K3100M on Sonoma

<a class='btn-link text-dark' href='/search/label/gpu?max-results=12' target='_blank'>GPU</a> not working with iMac 2011 27" / <a class='btn-link text-dark' href='/search/label/gpu?max-results=12' target='_blank'>Nvidia</a> K3100M on Sonoma

https://preview.redd.it/sbyktq7ctgcf1.png?width=1548&format=png&auto=webp&s=b17f1c35ecea38b1b5be1e57b7aabbbcd68da4d3

I have installed K3100M in my iMac 2011 27" with Sonoma fresh install using OpenCore Legacy Patcher. At first it seemed ok, every worked, but I noticed that the machine did not use graphics acceleration from K3100M at all. I tried to search for solution, but none had the same problem. Any helps are appreciated.

Author: @Altruistic_Bread222