Bench essentialsResearch pick
NA-FC1 PWM fan controller
NA-FC1
Set bench airflow with a manual PWM dial or trim a motherboard's fan-control signal.
- Interface
- 4-pin PWM
- Format
- Fan control accessory
LAB / NoctuaHARDWARE EDIT
Category illustration · not a product photograph
BENCH ESSENTIALS / NF-A4x20 PWM
NF-A4x20 PWM compact fan
A thicker 40mm PWM fan for compact heatsinks and directed bench airflow.
IN YOUR WORKFLOWCompact 12V cooling
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THE DETAILS THAT MATTER
At a glance.
- Brand
- Noctua
- Model
- NF-A4x20 PWM
- Interface
- 4-pin PWM, 12 V
- Form factor
- 40 × 40 × 20 mm
- Voltage
- 12 V
- Connector
- 4-pin PWM
- Size
- 40 × 40 × 20 mm
- Maximum Speed
- 5,000 rpm
Thermal bench method
Compare the same workload and cooling setup.
NF-A4x20 PWM compact fan changes the physical cooling setup. Keep the workload, ambient conditions and external measurements consistent when checking whether the symptom changes.
- Check supply voltage, connector pinout, clearance and mounting against the equipment documentation. Match pad thickness or paste use to the specified assembly.
- Use supported system or vendor tools to record temperature, fan behavior and workload before and after a single cooling change.
- If a PCIe fault is part of the symptom, preserve the device’s separate Header7F evidence and relevant logs with each cooling setup.
Header7F does not monitor temperatures, fan RPM or PWM, and a cooler setup does not prove the cause of a PCIe fault. External thermal measurements remain separate evidence.