Performance increased for me. Intel i7 2600K, 8GB RAM, GeForce GTX770, 1920x1080 high graphics settings: 0.34(stable) = 40-50FPS, 0.35(stable) = 30-40FPS, 0.36(Experimental) = 40-50FPS 0.37(Experimental) = 55-60FPS (vsync) FPS dropped to 40FPS for short time(like 2-3 seconds) while zombie respawn close to me.