I agree that you want a good game experience, but people are a bit obsessed with FPS. DayZ Mod is based on Arma2 Operation Arrowhead, released in 2010. That game and the mod need more CPU than GPU.
I find that from time to time my view is not as fluid or crisp. Maybe its new drivers or maybe windows updates. Who knows.
I’ll usually go into the video settings, set it all back to default and tweak from there.