Im on an i7 and nvidia GT640M.
I was running arma 3 alpha at about 30 fps (with 88% rendering on) and now with the same settings in beta i am receiving 20 fps, lagging like im online, enemies lagging around the place, and its really hard to aim down sights as it keeps jerking.
Please can the full game, at least, have a major performance upgrade coz my rig can play bioshock infinite at 30 fps on ultra settings so it can handle a well optimized game.