AMD's Phoenix processor series serves as the foundation for the Ryzen 7040 series mobile processors and is anticipated to contribute to future Ryzen 7000G desktop models. This processor series is characterized by its monolithic silicon design and is notable for integrating an AI accelerator—a first for AMD chips. The silicon supports up to eight Zen 4 CPU cores and features an integrated GPU (iGPU) with up to 12 compute units based on the RDNA3 graphics architecture. It also includes advanced display I/O and media acceleration features.
The Phoenix lineup currently comprises two distinct silicon dies—Phoenix1 and Phoenix2, also referred to as Small Phoenix. Phoenix1 is equipped with eight Zen4 cores and up to 12 RDNA3 compute units. In contrast, Phoenix2 offers a hybrid CPU configuration with two Zen4 cores and four Zen4c cores, alongside an iGPU consisting of up to four RDNA3 compute units. These processors are associated with graphics subsystem IDs 15BF and 15C8, respectively.
AMD has identified that their nearly 200 mm² silicon, produced using the 4 nm fabrication process, is not cost-effective for lower-end SKUs, leading to the development of the smaller 137 mm² Phoenix 2 silicon. This variant forgoes the AI accelerator, opting for a reduced iGPU and a hybrid CPU configuration with two Zen 4 and four Zen 4c cores. Emerging from the public PCI Device ID repository are indications of additional variants named Phoenix3 and Phoenix4, with IDs "1900" and "1901." These IDs differ from the original Phoenix IDs, suggesting that these new variants could either be based on the existing RDNA3 architecture or a new iteration such as RDNA3.5.
Currently, AMD's driver encompasses 483 variants for PHX1 and 19 for PHX2, which cater to various OEM needs. These variants are distinguished by unique Sub Device IDs for compatibility, including integrated graphics models such as the Radeon 780M, 760M, and 740M. However, the driver database does not reference Phoenix3 and Phoenix4, implying that these could be either updates for a next-gen mobile lineup, potentially the Ryzen 8000 series, or relate to the forthcoming "Hawk Point" series derived from the Phoenix chips.
The introduction of new IDs "1900" and "1901" in the PCI ID Repository hints at possible future iGPU models for Phoenix 3 and Phoenix 4. There is speculation that these could represent rebranded chips, possibly under the name "Escher," or new chips featuring unique configurations of Zen 4 and Zen 4c cores. The exact nature of the CPU, iGPU, and AI accelerator integrations in these chips remains to be clarified as more information becomes available.
Sources: The PCI ID Repository, VideoCardz
