Its verry unbalanced your build. You give a lot of money on motherboard,case and you buy an 500W PSU ? Buy a cheaper motherboard. If this build is for gaming buy 2500k is more than enough.Buy an 600-650W power supply.
Actually a 500 watt psu will run that computer perfectly well , and buying a higher wattage unit will just add cost and probably lower the efficiency .
But it is not a particularly focused build if its for gaming