Yes i have played in max settings (hardcore).But it is not the maximum.Developers say that this beta version dosnt have very high graphics option.although hardcore settings equals to high settings.(visible on top right corner)
As the developers said crysis 2 has low requirements, i think everyone can play who played crysis 1(geforce 80 series +)
Anyhow,crysis 2 deserves best game of the year award.