I get ~515 H/s @ 105 W on XMR with a Powercolor HD 7850 and ~195 H/s on ZEC for ~140 W with the AMD blockchain drivers.
Woa! Thats nice! My cards Gigabyte are clocked 975MHz core. And 1200MHz memory (I think)
One of the cards is very easy to overclock but the other one have worse ASIC Quality and don't like clocking of the memory at all.
I think I could get both cards Core up to 1200MHz at some point before. On the other hand they run really cool now 40-46C.
So you raised the core to 1.2V and GPU to 1225MHz and Memory 1500MHz -10% powerlimit