If graphic settings in Crysis are identical, shouldn't FPS and pic quality increase if crossfire is enabled? I've tried updating drivers and rebooting each time I change crossfire setting but both modes have the same fps.
4830's.... maybe there's your problem ? Also it depends on your settings, if you are running at 800X600 for example you may not see any increases, just for an example, because you would be all cpu limited. Post your complete specs, and what settings you are trying to run at.
As romulus47plus1 said have you patched it ?
Dont know if its had any updates on the actual discs, not sure if they do that kind of thing but the game didnt support dual cards at release so unless they made an updated game release you have to patch it.
yes, it sounds about right. and your 4850 problem was definiltey a overheating one. I find the Sapphire cards run from 50 to 80 degrees, whereas the Palit 4850's run at a jaw-droppingly amazing 35-55 degrees.