With Windows 11 23H2 setting the stage for increased prevalence of AI in client PC use cases, the new hardware battleground between AMD and its rivals Intel, Apple, and Qualcomm, will be in equipping their mobile processors with sufficient AI acceleration performance. AMD already introduced accelerated AI with the current "Phoenix" processor that debuts Ryzen AI, and its Xilinx XDNA hardware backend that provides a performance of up to 16 TOPS. This will see a 2-3 fold increase with the company's 2024-25 mobile processor lineup, according to a roadmap leak by "Moore's Law is Dead."

At the very top of the pile, in a product segment called "ultimate compute," which consists of large gaming notebooks, mobile workstations, and desktop-replacements; the company's current Ryzen 7045 "Dragon Range" processor will continue throughout 2024. Essentially a non-socketed version of the desktop "Raphael" MCM, "Dragon Range" features up to two 5 nm "Zen 4" CCDs for up to 16 cores, and a 6 nm cIOD. This processor lacks any form of AI acceleration. In 2025, the processor will be succeeded with "Fire Range," a similar non-socketed, mobile-friendly MCM that's derived from "Granite Ridge," with up to two 4 nm "Zen 5" CCDs for up to 16 cores; and the 6 nm cIOD. What's interesting to note here, is that the quasi-roadmap makes no mention of AI acceleration for "Fire Range," which means "Granite Ridge" could miss out on Ryzen AI acceleration from the processor. Modern discrete GPUs from both NVIDIA and AMD support AI accelerators, so this must have been AMD's consideration to exclude an XDNA-based Ryzen AI accelerator on "Fire Range" and "Granite Ridge."

"Strix Point" is the codename for AMD's next-generation mobile processor succeeding the current Ryzen 7040 series "Phoenix." More details of the processor emerged thanks to "All The Watts!!" on Twitter. The CPU of "Strix Point" will be heterogenous, in that it will feature two different kinds of CPU cores, but with essentially the same ISA and IPC. It is rumored that the processor will feature 4 "Zen 5" CPU cores, and 8 "Zen 5c" cores.

Both core types feature an identical IPC, but the "Zen 5" cores can hold onto higher boost frequencies, and have a wider frequency band, than the "Zen 5c" cores. From what we can deduce from the current "Zen 4c" cores, "Zen 5c" cores aren't strictly "efficiency" cores, as they still offer the full breadth of core ISA as "Zen 5," including SMT. In its maximum configuration, "Strix Point" will hence be a 12-core/24-thread processor. The two CPU core types sit in two different CCX (CPU core complexes), the "Zen 5" CCX has 4 cores sharing a 16 MB L3 cache, while the "Zen 5c" CCX shares a 16 MB L3 cache among 8 cores. AMD will probably use a software-based solution to ensure the right kind of workload from the OS is processed by the right kind of CPU core.

A couple of slides from AMD's internal presentation were leaked to the web by Moore's Law is Dead, referencing what's allegedly the next-generation "Zen 5" microarchitecture. Internally, the performance variant of the "Zen 5" core is referred to as "Nirvana," and the CCD chiplet (CPU core die) based on "Nirvana" cores, is codenamed "Eldora." These CCDs will make up either the company's Ryzen "Granite Ridge" desktop processors, or EPYC "Turin" server processors. The cores themselves could also be part of the company's next-generation mobile processors, as part of heterogenous CCXs (CPU core complex), next to "Zen 5c" low-power cores.

In broad strokes, AMD describes "Zen 5" as introducing a 10% to 15% IPC increase over the current "Zen 4." The core will feature a larger 48 KB L1D cache, compared to the current 32 KB. As for the core itself, it features an 8-wide dispatch from the micro-op queue, compared to the 6-wide dispatch of "Zen 4." The integer execution stage gets 6 ALUs, compared to the current 4. The floating point unit gets FP-512 capabilities. Perhaps the biggest announcement is that AMD has increased the maximum cores per CCX from 8 to 16. At this point we don't know if it means that "Eldora" CCD will have 16 cores, or whether it means that the cloud-specific CCD with 16 "Zen 5c" cores will have 16 cores within a single CCX, rather than spread across two CCXs with smaller L3 caches. AMD is leveraging the TSMC 4 nm EUV node for "Eldora," the mobile processor based on "Zen 5" could be based on the more advanced TSMC 3 nm EUV node.

Beating previous reports that AMD is increasing the CPU core count of its mobile monolithic processors from the present 8-core/16-thread to 12-core/24-thread; we are learning that the next-gen processor from the company, codenamed "Strix Point," will in fact be the company's first hybrid processor. The chip is expected to feature two kinds of CPU cores, with "Zen 5" being the microarchitecture behind the performance cores, and "Zen 5c" behind the efficiency cores. An engineering sample featuring 4 P-cores, and 8 E-cores, surfaced on the web, thanks to Performancedatabases. A HWiNFO screenshot reveals the engineering sample's core-configuration of 4x P-cores and 8x E-cores, with identical L1 cache sizes. Things get a little fuzzy with the L2 cache size detection, and L3 cache.

We know from the current "Zen 4c" core design that it is essentially a compacted version of "Zen 4" designed for higher-density chiplets that have 16 cores; and that it has both the same ISA and IPC as "Zen 4," with the only difference being that "Zen 4c" is designed with lower amounts of shared L3 caches at their disposal, are generally configured with lower clock speeds, and have higher energy efficiency than "Zen 4." "Zen 4c" cores also 35% smaller in die-area than "Zen 4." The company could develop "Zen 5c" CPU cores with similar design goals.