Tearing when playing Games

I just got a new system with Sierra preinstalled (specs below). The desktop seems to run fine.

I installed Steam and playing Bioshock Infinite and Deus Ex Human Revolution I get lots of tearing, while the games themselves run as fast as can be. There is no option for vsync ingame.

Any idea, what I coud do?

Specs:

Intel Core i7-4790k

MB Gigabyte GA-H97M-D3H

16 GB RAM Crucial Ballistics

EVGA GTX GeForce 950 SC 2GB

submitted by /u/1pennythought
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