Enable Active Heat Sink and Fan Duct with Fan. If you have recently changed the BIOS settings then it may be a cause why the Asus fan error is appearing. 
If you simply update the BIOS version to its latest then you are good to go. Most of the time fan errors on ASUS and Megatrends related to BIOS software malfunctioning.
Change the CPU Fan Speed to Ignore and Confirm changes. Look for the Monitoring (Monitor) section. Navigate to the aforementioned Advanced settings. If the CPU fan error is appearing but a fan is working then you can disable this alarm. Disable CPU Fan Speed Monitoring in ASUS BIOS Lower the default to 300 RPM to 450 RPM and Save the changes.įix 3. The default value should be 600 RPM (Revolutions Per Minute). Find the setting that controls the CPU fan RPM alerts. (This section may vary with your motherboard’s model. Navigate to the CPU fan settings with in Advanced Settings. 
Get into BIOS by pressing F1, F10 or Delete key upon startup.To change fan speed lower limit, follow these steps: Set the “CPU Fan Speed Low Limit” to 200 RPM in BIOS configuration. Ensure that the CPU FAN cable is securely installed to the CPU_FAN connector instead of the CHA_FAN.ĭoes the CPU fan is running at a required RPM? Most of the time the Asus fan error gives you a hint that the fan is underperforming concerning its RPM.įor users who are using NZXT, Corsair fan with lower revolution speed, the system may not be able to correctly detect it.H100i or H100i V2 and still fan speed error pops up, connect the hydero pump to the AIO_PUMP header (not in CHA_FAN).
For those who are using a water cooler i.e. Please make sure the CPU FAN is installed on the right position of the motherboard and twist the screws tightly. This fan error is appearing on Asus & megatrends motherboard because either nothing is connected with the cpu_fan header or it’s plugged in the wrong header. Users who are using Corsair or NZXT Kraken AIO CPU cooler mistakenly connect the wrong pump header in the motherboard. This error may be related to hardware or software so the fixes may differ for each user. Dust and debris slowed down the fan RPM. CPU fan isn’t connected with the motherboard cpu_fan header properly. The most common reason that triggers this error is. If the fans don’t spin properly then it may cause an increase in CPU temperature, resultantly it can damage internal hardware. This error shows that the motherboard safeguard feature is working fine. What Causes ASUS CPU Fan Errors on Startup?
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