Cannot fit more on 2.5D interposer
In early January we heard a thing or two about an AMD card codenamed Fiji, the one that comes with High Bandwidth Memory (HBM).
With 4GB of High-Bandwidth Memory and 4096 SPs
According to a fresh set of rumors, it appears that we might see AMD's next-generation Radeon R9 380X, based on Fiji XT GPU, as early as Q2 2015.
The Radeon R9 380X coming with HBM
New evidence coming from two LinkedIn profiles of AMD employees suggest that AMD's upcoming Radeon R9 380X graphics card which is expected to be based on the Fiji GPU will actually use High-Bandwidth Memory.
Stacked with love