My specs:
i7-4930k @ 5.1GHz (watercooled)
32GB ddr3 @ 2133MHz
r9 290x @ 1140MHz core / 6000MHz memory
Dayz/OS installed on a 240GB Corsair Force GT SSD.

Settings:
1080p @ 120Hz (have to force that, annoying)
Vsync: Off
Tex Details/Filering: Very High
Objects/Terrain/Clouds: Very High
Shadows: Low
Antialiasing: Disabled
Alpha to Coverage: Disabled
Edge Smoothing: Disabled
HDR Quality: Very Low
Ambient Occlusion: Enabled
Post Process Quality: High
Bloom: Minimum
Rotation Blur: Minimum

CFG specific Changes:
preferredObjectViewDistance=1000
GPU_MaxFramesAhead=1;
GPU_DetectedFramesAhead=1;

Launch Options:
-CpuCount=6 -ExThread=11 -maxVRAM=4095 -maxMem=32768

Top out @ 45fps in the wilderness, 30ish in cities, in the 20's with weapon out running around with other people.