I can confirm 1070 doing over 1300kH neoscrypt if You don't mind high power consumption.
Just use klaust miner and intensity -i 17.6
My clocks are around 2000Mhz gpu and 4500Mhz vram.
Than you are lucky, on my rigs intensities over 17 always say out of memory

Also high consumption you mean like 175W+?

It would be good to state your model.