How well does the Zotac Mini do with cooling a 1080 Ti? We have some of the 1070s with that cooler and they do well, but at about half the power consumption. That's a nice price in any case of course.
While the Mini form factor works well on a 1080, the 1080ti is a big enough jump in power usage I'd be seriously worried about it's cooling.
GMO's "mining card", IF it ever actually gets created, is at best a year and more likely 2-3 years away.
As of right now it's little more than a roughed out concept since it's intended to use 7nm tech that doesn't EXIST yet (outside of possibly early LAB prototype work).