Yeah. About those minimum specs? They are way off.
Consider this; I have an 4770k and 770, yet I get between 30-60 fps on multiplayer. Yes, it is that wide of a scale. Single player is different though. You could run single player with maybe 60fps on medium low settings. On multiplayer everyone gets screwed over, especially higher population servers.
TL;DR no one runs Arma 3 on high without suffering.