You do not need any vram to play minecraft. I used to play it on a 1gb ati card. I now have a 1050ti and its still runs above 60. But for arma3.. Arma 3 is more of a cpu heavy game and you will most likely not getting constant 60 in mutiplayer. Ark is another horribly optimized game. You have a good setup if that 960 is a 4gb vram card.
