Case study

ThinkCentre Fan Control: recovering fan telemetry and modes from the M70t Gen 6

ThinkCentre Fan Control uses findings from M70t Gen 6 embedded-controller probing and ACPI table analysis to show fan RPM and offer firmware fan modes. The Windows tray app reads the EC tachometer through PawnIO, obtains per-core temperatures from CPU registers and changes supported modes through Lenovo WMI.

Targets: Firmware
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C1 partial scope or analysis entry

Stars: 2
Last commit: 2026-07-17
Language: C#
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Demo screenshot from the project's public documentation

Observed: Download and demo observed; the case covers part of the target software.
Scope: Partial
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: Requires Windows 10 or 11, Administrator rights, and the PawnIO driver; building from source requires the .NET 8 SDK.
Limits: The author reports support for fan modes, including Full Speed, on ThinkCentre M70t Gen 6 board 3376. Other boards use its EC layout as a fallback, so readings may be inaccurate; mode writes are disabled.
Limits: Exact RPM setting is not supported.
License: MIT license.

Cite

BibTeX

@misc{thinkcentre-fan-control-case,
  title = {{ThinkCentre Fan Control: recovering fan telemetry and modes from the M70t Gen 6}},
  howpublished = {\url{https://github.com/blazingphoenix7/thinkcentre-fan-control}},
  url = {https://github.com/blazingphoenix7/thinkcentre-fan-control},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/thinkcentre-fan-control-case/}}
}

Plain text

ThinkCentre Fan Control: recovering fan telemetry and modes from the M70t Gen 6. https://github.com/blazingphoenix7/thinkcentre-fan-control (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/thinkcentre-fan-control-case/

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About this entry

The description was reviewed against primary sources.

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Primary sources

README.md GitHub · blazingphoenix7/thinkcentre-fan-control · Revision 8c77f97
docs/research/ec-decode-m70t.md GitHub · blazingphoenix7/thinkcentre-fan-control · Revision 8c77f97