I don't know what issue people with gsync monitors are having with the game. I have a Asus PG279Q at 165hz and gsync active, and a GTX1080ti and the game is incredible with it. 4K, uncapped framerate, running in borderless window mode, with gsync set to "Windowed and Fullscreen" in the Nvidia control panel. It's perfect and I was actually hugely surprised just how smooth it is.