If ethereum relies on memory bandwidth, how the heck are you guys coming up with these hashing estimates when it only has a 256-bit bus? I don't think it's going to be anywhere near 30mh.
it's not only about memory bandwidth there are other parameter that work in sinergy with it and need to be taken into account, but yes probably max 25 and more realistic scenario would be 22
the 1070 on the other hand is confirmed to perform a nice 27MH at 100w
I think the power consumption matters a lot. It means we the home miners who pay high electricity price can compete with the farms with old GPU again.