Yes, I do get sound. I can hear game music and even my mouse scrolling across buttons in the video options.
A Hail Mary here, but is it possible that Crysis at 1080p is too much bandwidth for my DVI-HDMI cable (8ft Monster 800 series). I doubt it becaause it still didn't work with everything on low and/or turned off.
Hopefully Paradigm Shifter will have some luck
Not my area by any means but I would think that if it was a bandwidth problem you would have problems with FMVs in other games. But I cannot really see why a cable cannot handle anything that it was designed for.
Does Crysis let you Alt-Tab back to the desktop? That might be a way to prevent those hard resets. This may be mumbo jumbo but I have found that some programs that will not let me Alt-Tab at first will let me do so if I have some other application running. Like Notepad.
Perhaps Crysis has a default refresh rate it goes to when you switch to fullscreen? You may want to try Refresh Lock or Refresh Force and see if you get any different results. The app can use a different refresh than your desktop res.