Although not yet fully confirmed, Moore's law is dead shared new rumors related to AMD's next-generation Zen 4 / 4C, Zen 5, and Zen 6 CPU core architecture in a recent video** First, as the successor of Zen 3, Zen 4 kernel will be overhauled with higher cache and clock frequency. IPC performance is expected to improve by 15-24% and single thread by 28-37%, supplemented by the number of cores / threads similar to or higher than Zen 3.
Video screenshot (from Moore's law is dead / YouTube)
Thanks to the new 5nm process, the prototype sample frequency of Zen 4 CPU has been increased to 5.2 GHz, so the overall performance is expected to be greatly improved (8-14%) on the basis of Zen 3.
Other changes include the doubling of L2 cache seen in the recent epyc Genoa data / server CPU product line, but L3 cache should be the same as Zen 3.
The performance of avx-512 is said to be comparable to that of Intel ice lake-x with the same frequency / number of threads, and is up 50% compared with the previous generation Zen 3.
In terms of I / O, Zen 4 CPU will undoubtedly provide support for ddr5 / lpddr5 memory and PCIe 5.0 bus.
AMD ZEN 4 to ZEN 6 Leak Transforming into a Premium Brand - MLID（via）
The following is a summary of Zen 4's new architecture improvements:
● IPC performance: 15-24% higher than Zen 3
● clock frequency: 8-14% higher than Zen 3
● single threaded (st) performance: 28-37% higher than Zen 3
● multithreading (MT) performance: the improvement range is similar to or higher than that of single thread
● cache allocation: 1 MB L2 / 4 MB L3 per core (equivalent to 512KB per core)
● I / O specification: support PCIe 5.0 / increase the number of channels
● memory controller: support ddr5-5200 + / lpddr5
In terms of products, it is expected that Zen 4 family will cover the following product lines:
● Xiaolong / epyc Genoa 7004 (~ released in Q4 2022) - A0 silicon wafers in March, B0 testing.
● Ruilong / ryzen 7000 Raphael (~ 2H 2022) - samples have been sent out and will be officially put into production.
● Ruilong / ryzen 7000 dragon range (~ Q1 2023) - samples are expected in 2022
● Ruilong ryzen 7000 Phoenix (~ Q1 2023) - following Genoa, under test.
● thread Ripper / threadripper 7000 storm peak (~ 1H 2023) - under planning
*After Zen 4, AMD will also launch Zen 4C, * but it is said that it is only to meet the urgent needs of specific customers (mainly in the field of data center CPU).
● amd has confirmed that epyc Bergamo is one of the products adopting Zen 4C core, which provides up to 128 cores and focuses on ultra-high computing density.
● in contrast, Zen 4 Genoa has only 96 cores at most, but both it and Bergamo will be manufactured by TSMC 5nm process.
● in terms of slots, Zen 4 / 4C is compatible with SP5 (LGA 6096) and supports 12 channel memory and SDCI (intelligent data cache injection) and sdxi (intelligent data acceleration interface) engines.
Specific accelerator modules are connected to IO die, which is said to increase the cache hit rate of connected devices to achieve the best CCX calls in delay sensitive applications. The latter can copy / move data directly between devices without calling Zen 4 kernel.
However, amd may eventually launch only epyc Bergamo 700X, a Zen 4C product, which is expected to be released in January ~ 2023, but A0 streaming may be completed in June 2022.
*Next is Zen 5. It is said that its leap is as amazing as Zen 2 in that year, * and it is expected to come in 11-15 months. Despite the improvement of IPC performance relative to Zen 4, Zen 5 may also completely redesign its data structure (IFC) and cache.
Unfortunately, the frequency increase of Zen 5 CPU may end (or hardly improve), because amd tends to plug more accelerators on server SKUs and increase the number of threads of consumer SKUs.
The legendary new generation of "synchronous hyper threading" (smt4) technology has not arrived. It is still 2-way SMT, but there will be more cores per small chip.
It is expected that the core production process will be n4p or N5. However, given recent reports, most product lineups are expected to arrive between 2024 and 2025.
Individual models (such as epyc Turin) may be earlier. It is said that the goal is to sample in the fourth quarter of 2023. The rest of the main forces will be scheduled to ship in the first and second quarters of 2024.
The following is a summary of Zen 5 product line estimates:
● Xiaolong / epyc 700X (expected to arrive around the second half of 2023)
● Ruilong / ryzen 8000 granite ridge (expected in the second half of 2024)
● Ruilong / ryzen 8000 Strix point (expected in the first half of 2025)
*Finally, the Zen 6 core architecture: * amd may not continue to use the "Zen" brand after Zen 5, but its alternatives may have to wait until after 2025.
As for the higher number of cores, clock frequency and updated cache / accelerator design, it is not known at present. If there is any change, the company should choose the opportunity to share its refreshed product roadmap.
However, what attracts us more is that mlid broke the news that after 2025, AMD will reestablish the "high-end" image of its server / notebook product line.
If so, the red team is bound to increase its efforts in the fields of high-performance computing (HPC) / artificial intelligence (AI) / mobile, so as to have a more positive confrontation with competitors such as Intel / NVIDIA.