Ok so by default, setting the graphics to extreme these config parameters:
sys_spec_objectdetail
sys_spec_particles
sys_spec_postprocessing
sys_spec_physics
sys_spec_shadows
sys_spec_texture
sys_spec_water
sys_spec_gameeffects
sys_spec_shading
sys_spec_VolumetricEffects

Are set to 3 ? eg: sys_spec_shadows=3 ?

And if i put those parametters in the autoexec.cfg and set them all to "=4" will make a noticeable difference in the game?

= 3 is as high as crysis 2 goes at the moment = 4 Will be added (probably) once the features they promised us at launch get added finally (DX11)

Ok, so if i put to all those config parameters above to =4 it will not make a difference by quality in the game ?