I read some of the comments on the reddit link, but still, i'm not sure if these specs are good news or not for GPU mining.
From what little I understand, the 1080ti we see on the market today already have 11 GB memory. So isn't 12 GB memory not much of an advantage / enhancement to existing models? Please correct me if i'm wrong, maybe the fact that it is "GDDR6" could also play a dramatic role in improving it's performance.
Compared to 580's/1070's this chip arrangement will have nearly 700GB/s of bandwidth, so for memory intensive algorithms were talking theoretical increase of ~2.5-3x, and about a 2x increase from 1080.
Probably looking at 75MH/s + eth hashrate at under 200 watts.
FYI this is in line with what the Titan V does (80 MH/s) with the same bandwidth.