Alright so preliminary results are...okay.
I've clocked it up to
1354mhz Base/2050mhz Boost
11124mhz RAM
Stably running with a 38% fan speed (inaudible) not going over 64c
So far, in comparative speeds I'm seeing a literal
2.5% increase (in synthetic benchmarks) over my 2x980s.
So that's kind of meh, but it's still pretty impressive for a single card however. I'm #170 worldwide for a single 1080 on the Firestrike Extreme recordboard.
Pics because why not. The cooler is pretty ugly IMO but it works great: