Well finally done with the new PC! No regrets! The ONLY drivers for the new 1080's are Nvidia's 368.39, which are not the best I've used but the smoothest for sure. There is a little more shimmering than the 368.22 on the 970. I've pushed a lot of the sliders to there max and upped the graphics to 2048x2048. 27 FPS all day and night long (I fly nap of the earth mainly). The new card seems to hate one ORBX airport in particular and will have to investigate. Other than that...maybe there will be better drivers in the future as I don't want to use NI for shimmers. If your using a high refresh rate like 120HZ or above, there is a hotfix driver for the flickering problem. I'm @ 4K 60HZ.
Happy flying!
P.S. Maybe some vids in the future as this sim is gorgeous!