here my specs
GTX 660 2GB TWIN FROZR
RAM 8GB
PROC:INTEL G630
first time install and play ON HIGH SETTING no lag
and after close and open again
my crysis very2 lag
whyyy????
Your cpu is bottle-necking you. With a dual core you should lower the game settings to medium. I would try to upgrade to a quad core cpu.
Did you progress in the story line a bit? The opening level is very taxing.
if you are using TXAA - don't. Otherwise lower other details to medium etc.
The game itself doesn't suddenly lag without a reason. The actual level you are on can have a negative impact. ie Larger open areas with rain effects etc.
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