I have a custom built pc, Threadripper 2950x, Taichi x399 MOBO, and I am trying to reinstall all of my operating systems due to it defaulting to MBR after converting to GPT before installation. I have used Gparted, Gdisk, and even Windows utilities to try to convert to GPT. It is successful after converting, but upon installing ANY OS it converts to MBR. I have tried following tutorials on converting after the installation, they have failed. If it matters I'm installing to nvme drives with encrypted Ubuntu OS. Windows on nvme2, they both/all convert to MBR on install. This is driving me crazy, I appreciate any insight I can get into this.