Dual graphics card troubles

Hello I am trying to get my Mackintosh to run, but it is pretty unstable. my pc: Mono: Asus X99 - E - WS CPU: Intel i7-6950X Thunderbolt: ThunderbolteX 3 Graka: 2x GTX 1080Ti

Sometimes i get gIoScreenlockstate 3, and sometimes not. Sometimes the pc boots with the error, and sometimes not. Tried everything, installing new drivers... It is quite frustrating and everything else, including thunderbolt 3 works. Here is my EFI Folder: https://ufile.io/4dz1o

Thanks for your help