For Ubuntu 16.04 LTS

The card pulls 112Watt at the wall..maybe even less.

at 900 mhz gpu, 800 mvolt
1750mhz ram, 1000 mvolt


I was able to do 1200mhz gpu, 850 mvolt
1750mhz ram, 1000mvolt

It seems that the card becomes very power inefficient once it passes around 1100mhz-1200mhz gpu core.
I am going to test what I can undervolt the ram  to and lower core gpu mhz as well.