your going to have to mess with your start up parameters. to optimize for your system, arma does a horrible job at this by itself. there are threads here and on arma to do this. just google arma3 start up parameters. secondly your settings in game. other than that, based on everyone elses experience. I would NOT be disappointed getting that many frames on the assault server with that many people. during ops most of us sit around 20-25 fps.