Hello, I wanted to come back to playing this game legitimately but was troubled when i found myself down to 18FPS in Berezino. So to counter this I did some research. By Following this guide you probably will get better FPS.
Tip 1: Changing DayZ.cfg
Tip 2: Changing DayZ Profile
Tip 3: [nVidia Specific] Power Settings
Tip 4: Launch Parameters