I have just about everything you do, just different board, RAM config (4x1) and I can play with everything on high, some things on very high, AAX2, and have it be ~30-35 FPS. Try a crysis benchmark tool? What is your 3dmark (just for reference)?
Yeah, I guess that's the problem with crysis on LCD's. Either go below your native res, or tweak settings lower than desired.
I haven't read this yet, but today [H] explores Crysis and they only use fraps real world gaming (no timedemos). The settings they use in some games baffle me (Oblivion no grass but high shadows for example), but at least you can see what they consider playable and their results: http://enthusiast.hardocp.com/article.html?art=MTQ4MCw0LCxoZW50aHVzaWFzdA==