AMD’s Subsequent-Gen Flagship RDNA 3 GPU Die May Be A lot Smaller Than You Assume

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520 mm²—that is the scale of the Navi 21 GPU used within the Radeon RX 6800, RX 6800 XT, RX 6900 XT, and RX 6950 XT. Though it is dwarfed by NVIDIA’s largest GPUs, that is nonetheless a critically sizable chip. Rumors had positioned the top-end RDNA 3-based half within the Radeon RX 7000 collection at a barely bigger dimension, circa 600 mm², however that quantity is sophisticated by these components’ chiplet-based design.

The most recent info appears to point that the top-end RDNA 3 design, generally known as Navi 31, could have a single “Graphics Compute Die” (GCD) flanked by six Reminiscence Controller Cube or Reminiscence and Cache Cube (MCDs). The graphics compute die is clearly the place the magic will occur, whereas the MCDs will join the chip to GDDR6 reminiscence and cache the contents of stated reminiscence with both 32 or 64 MB of Infinity Cache.

As a part of an extended Twitter thread discussing the upcoming GPUs, trade insider and Digimon fanatic Greymon55 peeked in to supply his data to the die space discourse. One other recognized leakster, Kepler, had commented that the Navi 31 “whole die space” was within the ballpark of 600 mm², which is per earlier rumors.

In response to Greymon55, the GCD, the precise “processing” a part of the GPU, will solely be 350 mm². That is controversial primarily as a result of looks like an improbably small processor for the anticipated specs of Navi 31. The highest-end RDNA 3 half is anticipated to have 2.4x the shader cores of Navi 21, and even when we account for the shift to TSMC 5N, in addition to the elimination of the reminiscence interfaces and Infinity Cache from Navi 21, we might nonetheless be taking a look at some 375 mm², in keeping with German website 3DCenter.

Kepler and Greymon55 are literally in settlement on the die space. Kepler’s authentic assertion about “whole die space” appears to have been together with the six MCDs that we count on the ultimate product to have. He himself commented on the shock on the die space prediction, noting that the RDNA 3 structure really discards “numerous outdated architectural bloat.”

That features issues just like the XGMI GPU-to-GPU interface that was used on the Radeon Professional Duo, the legacy geometry pipeline (which means that RDNA 3 completely makes use of the Subsequent Era Geometry design that was carried out however not purposeful in Vega), the legacy scan converter is gone so there is no hope for analog outputs on these chips, and Vega’s World Information Share perform is seemingly eliminated, too.

So saying, the Navi 31 GCD seems to be very dense with compute certainly. We’re dying to seek out out whether or not this Radeon GPU can compete with NVIDIA’s monstrous monolithic AD102. Each playing cards must be out by the top of the yr.


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