This is the number of Cores that AMD Zen 5 CPUs will have by 2023


AMD has its Zen 4 CPUs ready, which should be entering the production ramp right now and therefore will hit the market in not too long. In the meantime, the company has slipped some interesting tidbits about Zen 5 coming next year or possibly early 2024 if TSMC faces any issues, where the number of cores will be the issue as well as its limitations.

Zen 4 is possibly the company’s most important change since the architecture was released. And it is that although on the desktop it will be an interesting jump in performance on the server everything is much more grandiose. It will go from the current 64 cores to 96 and 128 depending on the configuration, but what will Zen 5 achieve?

The number of Cores of Zen 5 and its processors

We do not know how many models AMD will put on the market, but we do have one thing clear: it will be a greater number than the current Zen 3. Intel is doing a lot of damage by taking over sectors where AMD is not even present and the increase in cores that we will see in Zen 4 both on servers as on desktop it will improve market segmentation for Lisa Su, but this will not happen in Zen 5.

And he will not do it because as he has commented Dan McNamara, senior vice president and general manager of AMD’s server division, there is no need to increase the number of CPU cores in your processors. This may surprise you, but Zen 4 will be the cornerstone of the new batch processor segment with its Zen 4C and Zen 4D with 96 cores and 128 coreswhere on the desktop we will see something similar with supposedly up to 32 cores.

This means that Zen 5 will have the same total numbers for both server and desktop, and of course there are several reasons why.

Lithographic node and the limitations of the architecture


Here we will differentiate into two parts: the first is speculative, the second is a confirmation from McNamara himself. First of all, there is a lot of controversy with the node used in Zen 3 and it is that TSMC would have suffered delays with the high-performance N3 variant, also known as N3Pwhile the N3E would have accelerated, but it is not suitable for Zen 5 and it is for Apple and its M chips, for example.

Therefore, it is said that AMD could continue with TSMC’s 5nm if they finally do not come to fruition, something that they will decide shortly because there is hardly any time frame. On the other hand we have confirmation from Mcnamara about the fact that Zen 5 will have the same cores as Zen 4 and alludes to the performance of cores without faster memory.

In other words, increasing the number of cores is only suitable if you have a global cache subsystem to match and if of course you have a much higher bandwidth in system RAM. Maybe 3D V-Cache come to solve part of this problem, but it is also possible that it will take time and especially money to stack this SRAM vertically. Therefore, AMD’s move with Zen 5 seems to be to choose the most optimal node within 5nm and add Vertical Cache to its processors, thereby increasing performance and maintaining the Core count in Zen 5.