Graphics Screen Tearing/flickering and low performance

[Willeexd]

When i start any game i get screen tearing/flickering and low fps and i need to use vsync to remove that flickering.
When i start a game in windows i get nothing of that and i get very high fps.

 

[slim.jim]

Try changing your system profile to iMac14,2.

 

[Willeexd]

Try changing your system profile to iMac14,2.

IT did not help