Hope someone has a solution for the problem i am having. 1080ti, sierra 10.12.5 (16F73). Display port to display port cable running to a PA328Q Asus 4K monitor. I am able to get 1080p no problem, however when setting to any higher resolution, the monitor does the pinkish color rainbow flicker and I have to roll back to 1080p. Ive tried rotating the slots on the card itself. I know for a fact this setup runs 4k no problem (linux). Any help would be greatly appreciated guys! Thank you!