Plz tell me how future proof is ASUS GTX 760 DIRECTCU II OC 2GB DDR5 like games watchdogs ac4 crysis 3 and alao upcoming game like the division, ac5, far cry 4...etc...on full hd monitor.... .. . If u know better card in this budget then tell me...... But plz suggest me only nvidia card.......
Well the GTX 670 is already a 2 year old card. So get something from the 7XX cards. A GTX 770 a rebranded 680 with a higher clock/memory speed. While still based on the older core it has faster memory.
Another option is to get a mid level card now and another mid level card in 2-3 years. a mid level card in 2-3 years will be an upgrade from many current cards(at least for the price).
In general, the more you spend the faster the card is, but at a certain point you do not gain enough to be worth it.
As long as you are not looking to "ultra" setting every game over 60fps, the 670 is a fine card.
The EVGA GTX 760 SC ACX comes factory overclocked at a higher speed than the ASUS and costs about the same, there is also de 4GB variant but it costs more and not very required. There is also de MSI GTX 760 around the same price. I'd recommend going for a 770 if you can, but it costs at least $100 more. Other than that, only the AMD R9 270x are on par with price/performance