Buddy, the choice you have made is a very poor one. GTX 650 is just a overclocked version of GT 640 and performs poorer than HD 7750. I am guessing your budget is around 8K. At this price, get a HD 7770 card. MSI HD 7770 is around 7.8K which is far far better card. MSI R7770-2PMD1GD5 GRAPHIC CARD
BTW, what PSU or SMPS do you have?