I don't have Crysis but I know a few friends that have 670's and play Crysis without any hiccups on maxed setttings. One thing is for sure, your cpu, video card, and memory should easily support that game with better fps. Do you have a good PSU? Also, I would recommend updating your video card driver to the newest beta driver 304.48. Many 670's had a stuttering issue which caused performance related issues in game for many people. The new driver fixed that and more.
The new beta did not help! Same FPS but they seem stable, so i will run with them for now. Thanks
Crysis is a coding failure it can't truely use your GPU's max power just like Metro 2033
^ Yeah this seems true, Some may ask why use a 5 year old game to test, I like to use it because back then ( NO PC could MAX it ) So i just like to try with a Newer system and still cant Max it :P so i guess its broke lol