I made a video to show you what my problem is since it's quite hard to explain :
https://www.youtube.com/watch?v=_-oizF4PSrk&feature=youtu.be (Be sure to watch it in high quality )
Look at the ground , specially in the back , I've this issue in many games , and have no idea what's causing this ...
AMD R9 Sapphire 390x
If you need more info's feel free to ask !