probably,,,, you can put it all together in pc partpicker and it will show you an estimated wattage. knowing how power hungry the amd cpu's are, u might want an 850w
yes.... a 600 watt would run that fine. and you could probubly (however i dont recommend it) scrape by with 500 watts.... the cards are pulling like 150 each peak.
i included the two 7950s in my calculation or are u crossfiring beyond that, with the 750w u could even go up to two 7970s in crossfire or 3 7950s in crossfire