Massive stutters

Ever since the last patch I am getting massive stutters when playing the game. Some information:

• Played 3 games on SR so far, all 3 had massive stutters,
• I played with 2 screens, fullscreen mode, (Game is on the primary screen), I got the impression that it was a bit better after turning of one screen
• OS: windows10
• CPU: I7 4790
• GPU: Radeon R9 270

I hope this gets hotfixed, because the game us near unplayable otherwise.