AMD Fury Nano pictures under the heatsink:

…and from the back:

The performance is claimed a little over R9 390X:

That is looking pretty damn good 🙂 Enrgic effectivity should be ~1.9x over R9 390X and ~1.4x over Fury X. These Fiji chips is are made with new 28nm process called HPX, but there is little information about it at all.