If you have a GeForce GTX 970 like me, I had the same Problem and Solved it by
Disabling Antialising completly into the GeForce System konfiguration.
I hope I can help you and you could post more Informations
Your Sincerely, Birdie
:edit Ahh you edited it so just go and try Disable Antialising,FXAA hope its working, cuz worked 4 me