Speculation: A 16-core Zen 4 CCD, or V-Cache, may just show its value

It has long been said that AMD will sooner or later decide to go the same way as Intel, that is, to offer processors containing two different types of cores. But according to the latest speculation, AMD wants to do it a little differently than Intel, which uses the Golden Cove and Gracemont cores in its current Alder Lake, ie different versions.

However, AMD should do it differently, using exactly the same Zen 4 cores, which would differ in their power limit, ie that would determine their final performance. However, such a solution could not even be described as a hybrid architecture, but the result would be essentially the same as in the case of Alder Lake, but with the advantage that all cores would handle the same instructions and that no Intel Thread Director middleware would be needed and sufficient appropriately tuned scheduler at OS level. After all, we wrote about the impact of using unequal cores in one processor today and it is the AVX-512 instructions, which, unlike the Golden Cove Gracemont cores, do not support, so Intel decided to completely deactivate them, even on processors that in addition to Golden Cove has no Gracemont cores.

AMD is said to use its experience and technology in mobile processors, so it can be said that it would create a mix of desktop and mobile processors, and according to the accompanying figure, its weaker and stronger cores could be equally represented, but this can of course be set everything, although with some limitations (see below).

The question is how such a processor would differ from today’s models, to which we would simply underwrite part of the kernels. As a result, it does not have to be a fundamental change, which raises another question of whether it would not be the other way around, ie whether we could not run all cores at high beats as a result, but a certain thing can prevent this.

According to the presented theory, AMD could also continue to build on its 3D V-Cache, which it should, because it did not only develop it to be deployed only on the Ryzen 7 5800X3D processor and then the end. And the resulting L3 cache could be located in a separate chip located on the CCD. But where?

In its current form, it is located in the area of ​​the original L3 cache, which does not heat up much on the chip, and thus does not prevent heat transfer from the cores located on the sides. That is, in the case of the new CCDs, the original L3 cache would replace the eight energy-saving cores, which will also not need much cooling (the marked 30 W of course applies to all 8 cores as a whole, not individually) and the powerful cores would again be where their heat transfer will not. nothing to defend.

The theory is certainly very interesting and probably feasible, but we still don’t know if it really has a real basis. But if Intel wants to offer up to 24 cores in the next generation of its Raptor Lake PC processors, why might AMD not have 32, plus 16:16, while we expect Intel to be 8:16 (stronger: weaker).

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Source: Svět hardware by www.svethardware.cz.

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