http://www.anandtech.com/show/9390/the-amd-radeon-r9-fury-x-...
Not sure if AMD is going to go all HBM on all it's high performance GPUs in 2017, or only offer one or two models with it.
http://arstechnica.com/gadgets/2016/03/amd-gpu-vega-navi-rev...
EDIT: MI6 is Polaris based, MI8 is Fiji with HBM, MI25 is Vega.
https://www.amd.com/en-us/press-releases/Pages/radeon-instin...