AMD Navi 4X concept renders demonstrate the complexity of the high-end RDNA4 GPU design

Published: Aug 17th 2023, 12:51 GMT   Comments

Please note that this post is tagged as a rumor.

AMD RDNA4 MCM, a complicated design that could already be canceled

A conceptual renders and diagrams explain why AMD might have been forced to cancel the GPU.

Concept AMD Navi 4X GPU render, Source: creper9000

AMD had to make revisions to its Navi 4X GPU rollout, potentially even considering the cancellation of its most advanced chips. While these claims are purely speculative rumors at this point, AMD has not taken any steps to refute them. The company typically remains tight-lipped regarding upcoming designs, unless discussing roadmaps or non-substantive presentations.

Even though AMD is in the process of launching the Radeon RX 7000 series based on the RDNA3 architecture, speculations extend much further. Leaked images of the Navi 4C die diagram emerged recently, possibly revealing that this complex design might not have been feasible in the near future, with some suggesting that it could be used for the successor to RDNA4.


Concept AMD Navi 4X GPU diagram, Source: Olrak29

The recent visual renders, shared by creper9000, originated from Olrak29‘s diagrams, which themselves drew inspiration from a leaked slide associated with Moore’s Law is Dead. Neither source has had access to the complete diagram or GPU, rendering these visuals purely conceptual and based on tidbits from various unverified sources. Nonetheless, the likelihood that such a design was in development appears high, considering it has been alluded to by multiple leaks in the past.

Concept AMD Navi 4X GPU render, Source: creper9000

The envisioned RDNA4 architecture not only embraces a multi-chip structure but also incorporates die stacking, a concept already disclosed for the data-center-oriented Radeon Instinct MI300 GPU series. The proposed strategy involves utilizing a sizeable interposer divided into three segments, each housing its dedicated Infinity Cache and GDDR memory controllers.

Adjacent to these core dies, referred to as AIDs, AMD plans to position a substantial multimedia and I/O die, establishing connections to every AID. The complexity amplifies as Shader Engines (SEDs) are integrated onto each AID. Reports suggest that a single AID could accommodate up to three SEDs, thereby affording AMD the potential to incorporate as many as nine SEDs within each package.

The launch of the AMD Radeon RX 8000 series remains distant on the horizon. Nevertheless, every company adheres to a rigorous development process that spans across months, and occasionally even years, before a design is deemed complete. While the fate of this Navi 4X design is yet to be determined, the insights gained from this undertaking are undoubtedly poised to give AMD a strategic advantage when developing a newer iteration for their future designs.

Source: creper9000, Olrak29

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