The difference between AMD Ryzen 3900X and 5900X

AMD released a new generation of desktop processor products-Ryzen 5600X, 5800X, 5900X, 5950X. AMD said that this series of processors will be listed on November 5, 2020.

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AMD said the AMD Ryzen 9 5900X processor has improved performance by up to 26% in selected games compared to the previous generation, the 8-core CCX design can directly access the 32MB L3 cache design. The new AMD Zen 3 core architecture has a 19% increase in instructions per clock cycle (IPC) performance and higher performance per watt than the previous generation.

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For this design, foreign media OverClocking introduced the changes made by AMD in the processor. Compared with Zen 2, the core of AMD Zen 3 now allows access to all L3 caches. Based on this, media produced two diagrams to introduce the differences in the internal structure of the two processors.

As can be seen from the figure, Ryzen 3900X has two CCDs. Each CCD is subdivided into two CCXs, which include 4 cores. In the case of 3900X, each CCX shields one core so that each CCD has six cores, so a total of twelve cores.

On the other hand, some optimizations have been made on Ryzen 5900X. The CPU still has two CCDs, but one CCX has eight cores and the other CCX has two cores disabled. As shown in the figure below, for Ryzen 5900X, all cores can access the entire L3 cache.

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