Ok guys.
Got my game yesterday.
With the editor i made myself a nice sightseeing tour with a HUMVEE to look around!
Graphic is awesome, and even so it performs somehow better than arma 1, which troubles my machine with even medium graphics..
Despite my machine is old, i can switch everything to very high except shadows and post-process, and it is fast enough to have a small shootout between me and a small troop of enemys.
But of course - my machine won´t handle a 100-unit fight, iam shure.