Upgrade from AMD 6400+ 3.2ghz -> AMD Phenom II X4 940 3.0ghz?

[DanielK]

Would i see big performance increase?

I run several app at the same time quite often, like movie on one monitor and game on the other and etc.

and I play Crysis, Fear2 etc etc.

And I edit large image files on image editors.

Thanks guys