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HWMonitor Fan Speed Not Showing

Quick answer: Missing fan RPM usually means the fan header does not expose tachometer data, the controller is unsupported, fan-stop is active, or another controller owns the reading.

What to check first

Missing fan RPM usually means the fan header does not expose tachometer data, the controller is unsupported, fan-stop is active, or another controller owns the reading.

Start with the least invasive checks: confirm the current application build, restart Windows, compare the value with Windows or firmware information, and note whether behavior changes under load.

Step-by-step troubleshooting

  1. Record the symptom before changing settings.
  2. Check Windows, chipset or graphics drivers, and firmware where relevant.
  3. Compare the reading with another built-in or firmware source.
  4. Change one setting at a time and retest under the same workload.
  5. Restore the previous setting if the change does not address the issue.

How to interpret the result

Hardware-monitoring data depends on firmware tables, sensor controllers, drivers and power states. A missing or unusual value is not automatically evidence of hardware failure. Consistent behavior across multiple tools and workloads is more useful than one isolated reading.

When to investigate further

If the same abnormal value appears in firmware and multiple monitoring tools, or the PC also shows instability, throttling, shutdowns or memory errors, investigate the underlying hardware, cooling, firmware configuration or driver stack.

Frequently asked questions

Should I change BIOS settings immediately?

No. Verify the reading with Windows and firmware information first.

Can drivers or firmware affect readings?

Yes. Low-level hardware data can depend on firmware tables, drivers, controllers and power states.

By CPUID.net Editorial Team · Published October 6, 2026 · Updated October 6, 2026