It can also be estimated that AMD will implement V-Cache on the new GPUs similar to the Zen 3+ chipsets, ie it will use the part of the chip that heats up the least. Of course, these will not be the shaders themselves, as they are not in the case of CPU chipsets or cores, but rather also the L3 cache, which is part of the GPU itself, or perhaps other less heat loss areas.
Of course, we do not know whether the basic GPU will have any of its own cache, ie whether it will not be in a separate layered chip, but from today’s point of view these are just details that we will be curious about only after the new GPUs come on the market. As a look at today’s Navi 21 shows, it will also depend on the location of the L3 cache in the GPU itself, which, unlike Zen 3 chipsets, is stretched in two narrow strips (shown in blue). Navi 31 should be laid out differently if the Infinity Cache is to be layered in Zen 3+ style.
Today’s Navi 21 carries 128 MB Infinity Cache with 1664 GB / s throughput, so the implementation of up to 512 MB of this memory in Navi 31 looks quite realistic with the use of a layered chip, and then even much more powerful Radeons could still make do with a 256-bit GDDR6 bus. , although already at 18 Gb / s per pin (total 576 GB / s).
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Source: Svět hardware by www.svethardware.cz.
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