You're a bit light on PSU....
220w x 4 = 880W without CPU, Mobo & Ram...
Try 3 cards and not 4 and see where it gets you!
I actually have another 850w PSU. My plan was to connect 3GPU + mobo on one psu and 4 GPU's on the second psu.
I tried with just 3 (switching the Asus and EVGA) but can't get it to work unless I put one of those cards directly on the mobo.