I recently just upgraded my computer after years, and I can finally push Crysis to the max and play it. Unfortunately I too have the fullscreen problem, and after literally hours of trying everything and tinkering, it is not working. I do have an HDMI cable in use.
The only method I haven't tried is the one seen here:
http://www.gamesas.com/forums/viewtopic.php?f=40&t=33442
However, I cannot seem to create the first custom resolution as my Nvidia Control Panel tells me it is a duplicate resolution. Is there a way around this?
Much thanks.