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A new set of rumors have leaked regarding the next-generation Xbox and PS5 and the GPUs both consoles will bring to market. We’ve known the broad specs of both platforms for a bit — both use AMD GPUs and CPUs, with the GPU based on AMD’s most recent RDNA architecture, while the CPU is derived from the same 7nm Ryzen CPU cores that launched earlier this summer. What we’ve lacked is specific details on the GPU cores themselves.
Eurogamer has gotten their hands on some leak data they feel is fairly legit, and the website’s track record with this kind of information is solid. There have been some rumored APU configurations that leaked earlier this year, but this new data implies the Sony PS5 will feature 36 GPU clusters clocked at up to 2GHz. Supposedly the silicon, codenamed Oberon, is designed to operate in three different modes (Gen 0, 1, and 2) with clocks of 800MHz, 911MHz, and 2GHz respectively. Supposedly memory bandwidth is 448GB/s in Gen 2 mode (though 512GB/s is an alternate possibility) and the GPU can reportedly also be variably configured in terms of ROP and core counts. Eurogamer states:

While a 2.0GHz GPU clock is used for what is described as the fully unlocked ‘native’ or ‘Gen2’ mode, the processor is also tested in what is referred to as Gen1 and Gen0 modes. The former is explicitly stated as running with 36 compute units, a 911MHz core clock, 218GB/s of memory bandwidth and 64 ROPs – the exact specifications of PlayStation 4 Pro. The latter Gen0 mode cuts the CU and ROP counts in half and runs at 800MHz, a match for the base PS4. The indications are that back-compat is an integral part of the silicon, which in turn raises some interesting questions about the makeup of the Navi GPU and the extent to which older GCN compatibility may be baked into the design.
The implication here is that the PS5 SoC contains multiple GPU clusters, just like the PS4 Pro did. Using multiple GPU clusters in the same SoC would give Sony the same ability to turn the clusters on or off depending on which mode the GPU was running in. Alternately, the GPU cluster could be physically unified but designed to allow for this kind of fine-grained power gating. Stamping out identical clusters would be simpler, designing a unified cluster with fine-grained gating is probably more complex but saves on die space.
As for the Xbox Series X, Eurogamer is implying this console packs serious firepower. Here’s the rumored configuration: