What psu for 6x (or 7) r9 fury nitro?

hi ive stumbled upon problem. what type of psu i can use to power thoose cards? im rather new to mining and want to invest building a rig of my own and theese cards seem to be quite cost effective
using claymore 12 miner, what proccesor anr ram would be good for it?

Evga 1600W at least or Super Flower 1600W