I have tried several different drivers that were available from NVIDIA or ASUS over the past month. In light of toyota's comment on directx 11 never being fully fixed, I think I will just turn off all dx 11 and turn everything else on and finish the game and hopefully never have to worry about it again. (and hopefully will never have to update the vbios again, although not being able to update the vbios appears to be a separate issue that nobody seems concerned about). I guess I'll keep it. Thanks everyone!