AMD has started making Linux kernel patches available for its next-generation GPU IP blocks. These releases generally indicate the beginning of enablement for a new GPU architecture.
In this specific case, GFXHUB 12.1 may indicate support for the CDNA5 architecture, which powers the company’s next-generation Instinct MI430 and MI450 accelerators for HPC and AI workloads. It’s also possible that it could be a next-gen integrated GPU from AMD.
The list of GPU IP blocks for which AMD has added hardware enablement includes PSP 15.0.8 (platform security), IH 7.1 (interrupt handler), MMHUB 4.2 (graphics IP), GFXHUB 12.1 (GPU IP), and GMC 12.1 (graphics and memory controller).
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Speculations
AMD has not officially disclosed which of its products use the GFX 12.1 intellectual property (IP). Its Radeon RX 9000 series GPUs, based on the RDNA 4 architecture, are known to use the GFX 12 IP.
And with that, there is a lot of speculation about what GFX means.
GFX 12.1 may refer to a superset of the GFX 12 IP for integrated GPUs, AMD’s next-generation GPUs based on the RDNA 5 architecture, or next-generation accelerators based on the CDNA 5 architecture.
A leak from earlier this year indicates that the GFX1250 nomenclature is reserved for CDNA 5 accelerators. The GFX1300 nomenclature would be intended for RDNA 5 GPUs.
The GFX 12.1 IP designation may also indicate integrated GPUs based on the RDNA 4 architecture. They present tangible differences in relation to existing RDNA 4 graphics processors, thus justifying a new IP denominator.
Another option is that it could refer to the next generation accelerators of the Instinct MI400 series, based on the CDNA 5 architecture. This last hypothesis is more likely, as all Zen 5-based APUs use RDNA 3.5 GPUs, making the development of RDNA 4-based iGPUs perhaps premature.
Competition
Apparently, AMD’s GFX1250 index belongs to the Instinct MI450 series of GPUs, aimed at AI. The GFX1251 designation belongs to the HPC-targeted Instinct MI430 series processors. Naturally, AMD never confirmed this information.
The start of activation of the Instinct MI400 series highlights the consistent execution of AMD’s roadmap for Instinct and CDNA for both AI and HPC. And it could serve as indirect testimony that the company is on track to revamp its Instinct family of accelerators with new offerings next year.
The main question is when exactly does AMD intend to launch its next-generation AI offering. That is, the Instinct MI450 product.
It remains to be seen whether the red team will be able to increase its production, as well as the production of its rack-scale Helios solution, based on its EPYC Venice CPUs and Instinct MI450 GPUs. And that’s before the launch of NVIDIA’s Vera Rubin platform, scheduled for Q3 2026.
Fonte: Phoronix.
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Source: https://www.adrenaline.com.br/amd/amd-prepara-instinct-mi400-suporte-inicial-aparece-em-patches-do-kernel-linux/
