So after enabling DX 11, the menu looked nicer (more tealish) and a noticeable difference ingame playing.
But since then, i've been experiencing some lag trouble every time in combat situation and that is really frustrating, even when I have a EVGA GTX SC 580 GPU and i7-2600K CPU.. what gives? Now, where it's getting worse, is when I turn off DX 11 feature, the in game image just looks shadier and uglier than before. Everything looks just dimmer and a couple of my friends are experiencing the same issue..

Can anyone tell me how I can fix this please?

im sure optimizations will come, all i can do is hope

I hope so too optimization will come from crytek with patches and nvidia with drivers. Plays like a crap even on a 2011 PC.