ok,first of all its good that you asked and didnt just buy it right away,so
if you want to upgrade your CPU the socket needs to be the same on the new proccessor as on the new one that you are willing to buy,so a intel 4670k wont fit into your motherboards socket,the ram has to be able to be in dual channel ,and your motherboard needs to support it,and you should take the exact same ram with the same clock speeds to not have any issues,allmost all the modern graphics cards fit into the PCI Express 16x slots without a problem,but they might drain more wattage then your power supply can deliver ,and a 1080p monitor will easily work with a 760,just check they both have hdmi compatible components (or vga,and dvi..whatever)and yea..
and make sure that they all fit into your case.
In your case id go with a better GPU and not get such a overkill 4670k for 760..and AMD graphics cards are cheaper at those price ranges.
if you want more information ,tell us exacly what your specs are
thank you,and thank me if i helped you