Ever since the new update to stable (0.45.124426). Dayz will only run at low resolution, the Max available in the video configuration is 640x400. I believe it is utilizing the onboard graphics instead of my nvidia 580m.
I have tried to alter the resolution and width in the .cfg in my documents to my native resolution ( Resolution_W=1920; Resolution_H=1080; )
While this did make the resolution change it still doesn't look normal.
I also tested my video card on other games and they ran fine utilizing the 580m and running at native resolution.