dxdiag and log files packed in attachment
restarting the pc didn't help.
here a video showing it:
http://www.file-upload.net/download-9546151/2014_09_18_23_01_25.mp4.html
DayZ graphic settings:
Video:
Rendering Resolution: 1920x1200(100%)
VSync: Disabled
Textures:
Video Memory: AUto
Texture Detail: Low
Texture Filtering: Low
Quality:
Objects: Low
Terrain: Low
Clouds: Low
Shadows: Low
Rendering:
Antialiasing: Disabled
Alpha to Coverage: Disabled
Edge Smoothing: Disabled
HDR Quality: Low
Ambient Occlusion: Disabled
Postprocess Quality: Very Low
Bloom: ca. 5%
Rotation Blur: ca. 5%