From what I've seen that the gtx 760 is better and will come with more updated features including gpu boost 2.0 which if you set to something semi good like 70-75c will overclock it for you until you hit that target temp, which should give about a 10% more performance over the gtx 670. I would recommend looking at the benchmarks for maybe both at reference clocks ect http://gpuboss.com/gpus/GeForce-GTX-760-vs-GeForce-GTX-670
Just look at the link for both cards as reference cards and then put in the oc potential of a better cooler
It depends on the price last I checked a they went for 350 I would almost skip going to the movies or getting that morning coffee and getting the evga gtx 770 from at 350-400 price range
i am on a different country so prices for gpu are different, but the brands that i'm talking about are the point of view 670 and palit jetstream 760, also not used to gpu oc'ing as i just started on cpu oc'ing
From what I've seen that the gtx 760 is better and will come with more updated features including gpu boost 2.0 which if you set to something semi good like 70-75c will overclock it for you until you hit that target temp, which should give about a 10% more performance over the gtx 670. I would recommend looking at the benchmarks for maybe both at reference clocks ect http://gpuboss.com/gpus/GeForce-GTX-760-vs-GeForce-GTX-670
Just look at the link for both cards as reference cards and then put in the oc potential of a better cooler