Just built a new rig what ya'll think

I just upgraded my pc from

My new build is more of an update than a new build, I added two EVGA gtx 970's super superclocked, a new mobo that supports 3way sli, an 850 psu and a 480GB SSD, and a 4k monitor to test these babies out. What should I do to increase my performance more.

PCPARTPICKER!