Soldato
You could yeah I'll certainly try but really I think the reference cards are often just not as good overclockers. I'm quite happy with it as it e.g Firestrike is up from 19000 to 20700 at less power then before.You have a great setting there. You just need to tweak it. Also it would be crashing if you keep P6 state at same voltage with P7.
It has to be lower.
Later tonight I will try to play with my Nitro+ and see at what point I can get 1600 at the lowest power available at 30% fan speed (watercooled) to give you an indication where to look at