Most likely not. Depending on the game, even newer ones, chances are that it will only be able to utilize 2 cores. There aren't too many games or applications for that matter out there that use 3 or 4 cores. Sure, it will help to a degree by maybe taking on a few of the background operations, i.e. Windows related matters, but as far as performance gains, it likely that you won't see much. When it comes to games and FPS, higher frequencies (i.e. speed) tend to help.