currently the evga is still efficient when it comes to mining equihash as stated in the video. 4.7sols/watt is the best settings overall.
i think there are 1070ti cards out there that can top this 4.7 sols. it's just that no one is experimenting / tinkering their 1070tis. how sad.
i hope there would be another alternative to evga. they're overpriced as of the moment.
Haven't found a more efficient option yet, though all but 1 of the 1070 ti models I have to date can MATCH my EVGA SC 1070 ti cards on efficiency, and that one (ASUS blower model) was very close.
It's the SAME GPU in the card, with a low power setting that makes cooling differences mostly a non-issue.