The 8700k is a performance monster. Even on the internal gfx card, you should be able to play the game with at least 105 fps.
Are you sure that you haven't plugged in your toaster?
It's weird that disabling the internal card works because you had 200 fps in battlefield.
Anyway, I'm glad that you can play again.
Spoiler:
blinking RGB LEDs in and around your computer will boost your fps and can cure cancer