have to try and disable g-sync

i use displayport

With 0.17.x i get sometime screen tear what 0.16 didnt have. the line goes from up to down in the middle of the screen.
The missing part from the middle is shown on the left side of the screen.
No other game or program does this.

i use windowed mode
win 10
asus gtx 1080
screen is 27" 2560x1400 144hz