Will the dual core help? yes it will. How it will help is split what programs are running on what cpu letting your game have more cpu resorces to work from. Dual core systems are more geared for multi tasking. Having several programs running at once. There is not a lot of software out right now that utilizes the benefits of dual cores but it is comming.
I have an AMD 4800+x2 processor. I play BF2 a lot as well. It helped this game due to taking other programs and running them on the other cpu. That is where your better game play will come in. WIll you get a rise in FPS. Maybe a few but not a whole lot. That comes from the actual speed of the cpu, graphics and bus.
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