jj463rd :
You're wrong as to games so far Microsoft Flight Simulator X and Supreme Commander are optimized for quad core CPU's and I believe AVG 8(security software) is optimized for quad core CPU's.
Actually he is correct.
He said "Few".
He did not say "none".
Few applications, especially games, are currently optimized for 4 cores.
Are ther some? Sure.
But neither all or even most.
And the game with which he specifically is concerned is not.
That is not to say that Quads are not for some (My last CPU purchase was a quad), but not for everyone in all cases.
For Crysis, the OPs current CPU and is running too slow and the GPU is a little weak.
Knowing the Exact Motherboard and Power Supply Unit may further help suggestions.
It will let us know what options are avaialbe to optimize his current processor as well what Graphic Units may help.