Your looking around medium to high setting on ARMA 3 and the highest settings on Skyrim.
I personally have not played Skyrim for a while but my build runs it no problem, i7 4790k Gigabyte Gtx 970. As far as ARMA 3, I have never played it, it is suppose to be way better optimized than ARMA 2 and DayZ Standalone. And I do have the DayZ standalone and I can play it on High preset with some adjustments to play at 60fps.