Advice on this new PC build

[Random_Matt]

The GPU psu requirements are always way over estimated. It's what it sucks out of the wall that matters, put it this way, my last rig was a 4670k @ 4.8GHz with a 770 on a 450W PSU. The build was certified by Nvidia and sold by many AAA system builders. You should ideally consult a PSU calculator.