600 W A-make 80+bronze certified powersuply can do the job, but if i was you and you gonne overclock, maybe better take a 750W 80+ bronze certified powersupply, they not much more expensive, and then you allways safe, and playing space to add more things later to youre system.
Good thing to do is head over to [url=http://pcpartpicker.com/]PC Partpicker[/url] and plug in your componets to a new build and there is a power consumtion estimate in the top right corner of your little build window. Or you could alternatively look for the maximum power rating on your parts, although that doesnt account for overclocking.
i had a Cooler Master GX700W lite no 80+ certification on it, i builded in my new build and i had realy problems with that thing, the power supply was fine, only wenn i was gonne game, that thing beeps continusley, so i tought maybe it was a faulty one, so i went back to the store with it, they testen the psu on a low rance system, did some benchses and test and there it was fine, so i asked them to test it on a heavier gpu, i have a 7870, zo they tested it on a simillar card, and yess then it begans to beep.... so 700W without 80+ certification is realy a no go, i was happy i could chace the power supply for a better one, i payed a extra 60 dollars to buy a better one, now i have a Enermax naxn 82+ 750W 80+bronze and the problem is gone.. so to me it was a good lessen never schwimp on youre psu, 80+ certification is inportant!!
do you think this will do the trick? http://www.amazon.com/Corsair-Enthusiast-Watt-Bronze-TX750/dp/B004MYFODI/ref=sr_1_7?s=electronics&ie=UTF8&qid=1362802024&sr=1-7&keywords=750W+80%2Bbronze