http://streamernews.tv/2015/09/02/silent-sentry-makes-a-how-to-optimize-your-dayz-settings-guide/
I didn't look at this, however if you GOOGLE there are lots of guides like this.
In the end though, you might as well just experiment on your own since your CPU + GPU combination is going to differ from other peoples.
Other:
The most important thing is to decide if you want VSYNC OFF (screen tear) or VSYNC ON (no tear). I use a feature called "Adaptive VSYNC" and adjust my settings so I stay above 60FPS about 90% of the time (60Hz monitor).
I prefer VSYNC ON as I hate screen tearing, but don't want to STUTTER when dropping below 60FPS with it on. Thus:
a) VSYNC OFF
b) Tweak game settings so you drop below 60FPS (60Hz monitor) less than...