A few renders of what a possible AMD Navi 4X Halo GPU based on the RDNA 4 architecture have been published which should us a glimpse of what this flagship gaming chip could've been.
You may have heard the rumor of AMD canceling its high-end RDNA 4 GPUs and focusing on the mainstream SKUs such as Navi 43 and Navi 44. There were also rumors that the high-end chips included SKUs such as the Navi 4C and Navi 4X which were supposed to go all out with an MCM design.
Now based on some concepts of what this high-end chip might've been, Twitter fellow, Olrak29, has posted a few diagrams of the chip which have further received full-on renders by @creper9000. Do note that these are just conceptual images and may or may not represent the final product.
AMD RDNA 4 "Navi 4X" GPU Block Diagram (Credits: Olrak29_):
Starting with the first image, we have a basic package that is composed of three main parts, the AID, SED (Shader Engine Die), and the MID (Multimedia & I/O Die). According to the early details revealed by Moore's Law is Dead, the AID and MID would have been featured on the base die & SEDs would've been featured on the AIDs in groups of three. The base-layer would've featured a total of three AID's an d a single MID interconnected with a Die-to-Die interconnect and each AID would have carried three SED's and connected via the same interconnect fabric.
The AIDs for Navi 4X GPUs based on the AMD RDNA 4 graphics architecture might've featured the Infinity Cache, interconnects, and GDDR PHYs. The TSVs to connect the SED's to the AID's would've also been on the AID portion of the chip. As for the MID, it might've carried the VCN, DCN, PCIe & I/O of the chip. The physical package of the whole Navi 4X Halo GPU is said to have been very
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