sunit swapnasarit :
ok... thanks friends.... I wall upgrade my Processer
You may wish to try the game and see how it runs on your present system. While I know the game can use 100% of a 4-core Intel like the i5-4440 at times in Multiplayer I'm not certain what the CPU usage would be with a GTX650 as all the benchmarks I've seen were with better graphics cards.
It's going to cost you $175 plus tax to get an i5-4440 I believe which is quite a bit of money.
And, as I said before you may be better off putting that towards a better graphics card since BF4 is likely not the only game you'd play. Many games will be fine with a 2-core Pentium (assuming it's a recent one). BTW, don't have a web browser running when playing games as they can often use a lot...