AMD rumored to be working on Zen APU with HBM

A whitepaper co-authored by AMD graphics engineer Mike Mantor suggests the company is working on a Zen APU with High Bandwidth Memory (HBM). This Zen APU would receive 128GB/s HBM, a feature that could significantly enhance the performance of the chip's integrated graphics. The whitepaper also reveals Zen will have a Onion3 connection with 50GB/s of bandwidth; up from the 40GB/s offered by the memory bus of the Carrizo APU.

This latest paper is very interesting for a couple of reasons, the first is because it carries a very intriguing illustration that depicts a Zen APU featuring a next generation fully memory coherent interocnnect, dubbed Onion3 capable of 50GB/S of total bandwidth. This chip fabric is based on the evolution of the AMD coherent memory technology in Carrizo which is in itself is an improved design of the Playstation 4 and XBOX ONE’s interconnects. The illustration also makes mention of “more CUs” referring to graphics compute units, which indicates that Zen APUs will feature larger and more capable on-board graphics engines than what we’ve seen before.

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