SK Hynix has (accidentally?) confirmed what we already knew:
AMD announced the Radeon™ R9 Fury X, the world’s first graphics card with HBM technology in Los Angeles on June 16th. The AMD Radeon R9 Fury X graphics card utilizes 4GB HBM1 to achieve up to 512GB/second memory bandwidth performance while reducing memory subsystem power by up to 85%.
http://www.businesswire.com/news/home/20150616005757/en/SK-Hynix-Ramps-Production-High-Bandwidth-Memory#.VYAjIkZGQ0g
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
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