GPU : GTX 750ti / 750 since this is a value oriented and energy efficient video card ( less fps but saves on power bills ).
Games : BF4 / far cry 4 and multiplayer titles.
Either i5 would be a better processor, but as far as saying it would add more FPS to games I am not the one to give that as I am not a gamer, I passed that age over 30 years ago.