Thanks for this guide. I picked up 4 of them in the states and getting 15.5+ M/H ETH on the 2 I have hooked up right now. Waiting on my risers to get here and should be able too pump them hard @ 60c. @+1000 clock I'm nearly hitting 16 m/h, but the 2nd card on the board is getting too hot 78c while the other stays sub 60c. Dualing SC doesn't seem worth it so will probably check out DCR and LBRY. EVGA OC edition if anyone is wondering. Samsung memory 
Yeah no matter what memory these cards max OC easily. My 6th card wont OC because of my board, as ASRock support said, because it's not meant to run 6 cards. Modifying the bios i was able to run, but guess my 6th card will have to run at 850. Not a big deal, 0.5MH/s more or less. I can only imagine how further will the miners be optimised for Pascal GPUs, who knows. Claymore is doing an awesome work, 94MH/s eth only mining rn with 6 cards
Cards run much hotter and draw more power when dual mining. Right now, eth only mining with this cards is bang for the buck, my system is drawing 400w and it costs me less than 10$ a month of electricity.
With dual mining you pay a little more for electricity, your cards are much hotter, my system draws around 450w when dual, and you pay extra fees to the pool, 1% to dcr pool and another 1% for Claymore. So eth only is best with these cards rn