AMD's openSIL "Open-Source" firmware has been successfully ported to existing AM5 motherboards ahead of Zen 6's debut.
Preparing For Next-Gen Zen 6 CPUs! AMD's openSIL Firmware Gets First Support on Existing AM5 Motherboards
Blog 3mdeb has been successful in porting an existing AM5 motherboard to Coreboot, a CPU initialization firmware for AMD's CPUs under the new openSIL initiative. openSIL was announced back in 2023 as a full-on replacement to the existing AGESA firmware, paving the way forward for open-source firmwares that'll be used by future AMD chips.
Last year, AMD confirmed that EPYC Venice CPUs based on the Zen 6 architecture will be the first next-gen chips to support openSIL in 2H 2026 while support for Medusa "Zen 6" client processors will land in the first half of 2027. Similar support will also be added for Zen 6 Ryzen CPUs, codenamed Olympic Ridge.
The blog was able to get Coreboot working on an MSI PRO B850-P motherboard, which is a mainstream offering. The new code already added to GitHub, it enables more motherboards to be ported over to the open-source firmware. You can read the full blog over here.
Just as a recap, openSIL firmware will offer:
- Agnostic 3 Static Library solution written in C-17 (Silicon, Platform & Utilities)
- Simple & Scalable integration with any x86 Host FW
- Flexible Platform library scalable to customer and x86 host FW needs
- Lightweight & Low chirp density for increased security
- Open-Source - right from the get-go!
Back in 2024, AMD further detailed the plans to support openSIL on Zen 6-based Ryzen & EPYC CPU platforms. During OCP 2025, AMD's Chief Firmware Architect, Raj Kapoor, presented the latest plans on openSIL support and highlighted that the server CPUs, such as the upcoming EPYC "Venice" series, will receive the first PoR intercept post launch. The usual open-source firmware release cycle is around one quarter after the product launch.
In addition to that, openSIL firmware support will be expanding beyond server to client platforms. The support for Zen 4-based Ryzen "Phoenix" CPUs has already been released, and next up is the support for Zen 6-based Ryzen "Medusa" CPUs. The PoR release for client Zen 6 CPUs is expected by the first half of 2027.
About the author: A Software Engineer by training and a PC enthusiast by passion, Hassan Mujtaba serves as Wccftech's Senior Editor for hardware section. With years of experience in the industry, he specializes in deep-dive technical analysis of next-generation CPU and GPU architectures, motherboards, and cooling solutions. His work involves not only breaking news on upcoming technologies but also extensive hands-on reviews and benchmarking.
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