# GNR-SMU: mapping Ryzen SMU telemetry and controls

> GNR-SMU maps undocumented AMD Ryzen SMU power-management tables through hardware measurements, load experiments and Linux sensor comparisons. It publishes model-specific field maps and Linux telemetry tools, with guarded controls for Granite Ridge CPUs and read-only telemetry for the Vermeer 5600X.

- Type: Case study
- Targets: Firmware
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-08
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/Kyworn/gnr-smu>
- Primary source: <https://github.com/Kyworn/gnr-smu/blob/def79d66d5431dfc4b6fc773f0b99fb99c8e378d/README.md>
- Catalog page: <https://awesomerea.org/resources/gnr-smu-case/>
- Record JSON: <https://awesomerea.org/resources/gnr-smu-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/gnr-smu-case/index.md)

## Requirements & limits

- **Prerequisites:** Requires Linux, the ryzen_smu driver and a documented CPU profile: 9800X3D, 9950X3D or 5600X.
- **Limits:** SMU writes are limited to validated Granite Ridge profiles; the 5600X profile is read-only.
- **Limits:** Many PM-table fields remain unidentified; the author reports measuring the complete 9800X3D index map on one machine.
- **License:** MIT License.

## Primary sources

1. <https://github.com/Kyworn/gnr-smu/blob/def79d66d5431dfc4b6fc773f0b99fb99c8e378d/README.md>
2. <https://github.com/Kyworn/gnr-smu/blob/def79d66d5431dfc4b6fc773f0b99fb99c8e378d/research/README.md>

## More in Firmware and hardware

- [SACD daemon reconstruction: rebuilding Sony BDP-BX510 sacd_extract_160](https://awesomerea.org/resources/sacd-daemon-reconstruction-case/index.md) · Case study
- [Holy Stone H120D: reconstructing drone Wi-Fi control and video traffic](https://awesomerea.org/resources/h120d-protocol-case/index.md) · Case study
- [Nokia E7-00 Linux: reconstructing the boot chain and device interfaces](https://awesomerea.org/resources/nokia-e7-00-linux-case/index.md) · Case study
- [CTS Strasbourg Ticket Reader: mapping SRI512 ticket memory](https://awesomerea.org/resources/cts-strasbourg-reader-case/index.md) · Case study
- [Chronos Revived: an Android client for the recovered smart disc BLE protocol](https://awesomerea.org/resources/chronos-revived-case/index.md) · Case study
- [PS2 Floating-point: reconstructing console arithmetic behavior](https://awesomerea.org/resources/ps2-floating-point-case/index.md) · Case study

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.