I saw one interesting theory, that it's a full GP100. After all, they are on to Volta now and need to get rid of the chips. Just cut the DP to 1/3 or something. Throw in water cooling and some nVidia marketing of course.
Or even not bother to cut the DP - it’d still be well below the levels of Volta but would give some people a genuine reason to buy it if was pitched at ‘merely’ Titan(+) levels......
We’ll find out I suppose. Doing that would definitely make it harder for Volta to stand out.