I bought new gaming pc but only have gt 210 graphics card now i am willing to buy gt640 gaming graphics card does it will be playable with i5 3470 plz recomment gt graphics which will fit my i5 processors. thank you
That I5 is a 1155 chipset (its your motherboard that counts rather than CPU but its modern enough to have no problems) So yes a GT640 will work. You will also need to check your PSU to see that it is capable of the increased power draw
In your case I strongly recommend a GTX 550 Ti The value is very similar and the performance gain is very large. Obviously, if you can add a little more, a GTX 650 Ti would be fabulous. In short, considering the price of the GT640, buy a GTX 550 Ti and be infinitely happier!