Starting point
1) base line your card - Max case & GPU fans, sliders for Temp + Power "TARGET" full Right, run your benchmark 3 or 4 times ... see what she will do out of the box
[so your Mem & GPU should be +0 MHz for your baseline test] - lets see what Nvidia Boost 4.0 can do all by itself
Make sure Each PCIe power port has its Own PCIe power cable ----> Do Not use the "second" jumped PCIe Plug that might be on the cable