Hi,
when I run in the game, there is kind of a wave effect on the landscape. Like it is divided into 2 or 3 parts that slightly jiggle around from left to right. The effect is barely visible, but it is there and it's a bit troublesome for your eyes.
It is there with 60 and 75 Hertz for the monitor.
There is an option in my graphics driver to force vsync, but that's only for 3d applications and doesn't change anything.