Hey MewKew,
thanks for your help!
I tried your setting and it's running now with about 30FPS +-3

What exactly does "sceneComplexity" and "terrainGrid" change?
i just set:
sceneComplexity=150000
preferredObjectViewDistance=1000.2638
terrainGrid=20

And it's running with 40FPS

But thanks anyway^^ I prefer FPS than quality.

My FPS drops too.

Gameversion: 0.35.0.115188
My specs:

AMD Phenom II X6 1090T @ 3,2GHz
16Gb DDR3 @ 1600MHz
Gainward GTX 570 Phantom
Win7 Ultimate 64bit

Ingame-settings:
-Resolution: 1920x1080
-VSync: off

Textures:
-VideoMemory: Auto
-Texture Detail: Normal
-Texture Filtering: Low

Quality:
-Objects: Normal
-Terrain: Low
-Clouds: Disable
-Shadows: Low

Rendering:
-Antialiasing: Low
-Alpha to Coverage: Disable
-Edge Smoothing: Disable
-HDR Quality: Very Low
-Ambient Occlusion: Disable
-Postprocess Quality: Disable
-Bloom: 0%
-Rotation Blur: 0%

22FPS @ Camp Balota looking at Chapaevsk:
http://www7.pic-upload.de/13.02.14/2uexbhrojcs.jpg

I hope it helps!

[edit]
With:

DayZ.cfg:
GPU_MaxFramesAhead=1;
GPU_DetectedFramesAhead=1;

Tolstoy.DayZProfile:
sceneComplexity=500000;
shadowZDistance=250;
viewDistance=3000;
preferredObjectViewDistance=1736.2638;
terrainGrid=25;

Startcommands:
-cpuCount=6 -maxMem=16384 -noSplash -noPause