We have no idea how extreme they're going to get with the sliders.Of course. But what kind of CPU could pull that off and not get crippled by that heavy load? (assuming it IS a heavy load....) hopefully my 2500K @ 4.4Ghz can handle the sliders on max. I think it's possible.
All this talk of 'maxing' the game and asking what sort of performance you can expect you can get at max with 'x' rig is so pointless until we know what 'max' means.