1) The version of bios is the last one
2) I updated bios exactly for 4g function and yes- it is on
3) No, never tried it before. I use 1 gpu for personal things like movies games and work so i also use headphones. Will this funciont take off all the sound or it doesnt matter?
4)I have UEFI bios by standard. Didnt reinstalled windows yet. Its official windows 10 (updated couple days ago).