AMD has published a reference guide for the third generation of graphics cores Graphics Core Next (GCN 3.0), also known by its codename "Volcanic Islands". Publication to correct some ambiguity with regard to graphics cores as part of APU Carrizo. On the one hand, Volcanic Islands are already used in the production company (Radeon R9 285 and other adapters). At the same time a part of the video core APU Carrizo will be the first solution that fully supports the specification of HSA 1.0.
Carrizo graphics core will be generation GCN 3.0, but will use specific instructions that do not support other decisions of this generation (this type of instruction and XNACK_MASK_LO XNACK_MASK_HI, only 24 mentions). Throughout the document, such positions are designated as "Carrizo APU only" (only for APU Carrizo). But there is another uncertainty. From the text it is not clear whether the APU Carrizo to support such an extension generation GPU Volcanic Islands, as a contraction in the frame buffer, which have video cards Radeon R9 285 on the GPU Tonga.
Developers GPU in order to balance competition resorted to the method of cutting opportunities .