I installed it and crysis 2 runs fine but the dx11 box is grey and i can't enable it. i have 2gb ram intel dual core duo 2.53gh nvidia gtx 460 1gb(dx11 graphics card)
and i need help quick I really want to try out the the water effects and dx11 tessalation
Your Core Duo might struggle with DX11, this game really needs a Quad cpu to get the best from it. Still, the option should still be there. Make sure you have installed the lastest patch (1.9) and the DX11 upgrade patch which is a separate download.