In the latest tubing video, Moore’s Law Is Dead shared new news about AMD’s next-generation Ryzen and EPYC processor “Zen 4D” architecture.According to the specifications disclosed by the leakers and insiders, each small chip has up to 16 cores, supplemented by the new cache design and hybrid architecture that will arrive in 2023.
(From: MLID | YouTube)
It is said thatAMDThe Zen 4D chiplet design will be used in the next generation of Ryzen and EPYC CPUs. The first release will be the Bergamo series of server chips scheduled to be launched in 2023.
And focus on “efficiency”IntelCompared with the hybrid architecture of the 12th-generation Alder Lake series chips, AMD’s Zen 4D chiplet architecture is still a bit different.
Although both companies have adopted two different core technologies on the same chip and have their own underlying cache design, AMD is more focused on maximizing multi-threaded performance.
MLID pointed out that the AMD Zen 4D core is a “stripped” version of Zen 4, with a redesigned cache and a small number of features. In addition, in order to achieve power consumption goals, Zen 4D also has a lower clock rate, but the main thing is to increase the overall core density.
Video screenshot (from: MLID)
Zen 4 supports up to 8 cores per chiplet, and Zen 4D packs 16 cores – this allows AMD to significantly increase the number of cores in next-generation processors and continue to maintain its lead in multi-threading performance.
Because of this, we are not surprised that it will be the first to be applied on the CPU of Xiaolong Bergamo server. As for the reason for stripping most of the functions, it is because Zen 4D’s 16-core CCD design will occupy the same space as the standard 8-core Zen 4 CCD.
In this way, the Zen 4D chiplet with full Zen 4 functions will not only become larger in die size, but it may also cut half of the L3 cache and eliminate the AVX-512 instruction set (SMT-2 has not been confirmed).
WCCFTech pointed out that such AMD Zen 4D chips are somewhat similar to the Gracemont (energy-efficient E-core) on Intel Alder Lake CPUs-they have lower clock frequencies, fewer L3 caches per core, and do not support SMT.
ZEN 4D & Zen 5 Leak – Moore’s Law Is Dead（via)
This looks a lot like the Gracemont core on the Alder Lake CPU. It also has a lower clock, L3 cache per core, and does not support SMT (Simultaneous Multithreading).
In terms of memory, it is rumored that Zen 4D-based Xiaolong Bergamo server processor will support 12-channel DDR5 (the next generation of AM5 desktop products are also promising), but it has not yet been confirmed by MLID sources.
As for the specific division of the next-generation consumer Ryzen product line, the Raphael series chips based on the standard Zen 4 architecture can reach 16 cores. The Zen 4D AM5 chip with up to 32 cores can also be used as a mainstream alternative to the HEDT thread tearer.
Although we have not heard of any Zen 4D-based Ryzen product line so far, it is expected that AMD “Strix Point” APU processors will use Zen 4D / Zen 5 cores and a design more similar to Intel Alder Lake method.
Finally, Zen 5 is expected to bring a 20-40% increase in IPC performance compared to Zen 4 cores, and it will arrive at the end of 2023/early 2024.
The Ryzen processor based on AMD Zen 5 architecture can reach 8 Zen 5 (3nm) and 16 Zen 4D (5nm) cores.
But this may be limited to the “Strix Point” APU series mentioned above, rather than the Ryzen CPU SKU that replaces Raphael’s “Granite Ridge”.