be quiet! Silent Wings 4 140mm High-Speed White Fan Review

Normalized Noise Tests

For these tests, I set the fan to speeds with noise output at the following predefined levels: 20/25/30/35/40/45 dBA. I skip the corresponding tests if the fan under the test cannot reach some noise levels. The speeds shown in the graph below are measured with the fan in a clear space inside my hemi-anechoic chamber without any obstacles. I set these speeds on the Longwin machine, but they slightly change because of the variable conditions that the device applies.

20 dBA Noise Output

Fan_20_RPM

Fan_20_CFM

Fan_20_Pressure

Fan_20_Power

• High enough speed
• Low airflow
• Low static pressure
• Low power consumption

25 dBA Noise Output

Fan_25_RPM

Fan_25_CFM

Fan_25_Pressure

Fan_25_Power

• Mid speed
• Low airflow
• Low static pressure
• Low power consumption

30 dBA Noise Output

Fan_30_RPM

Fan_30_CFM

Fan_30_Pressure

Fan_30_Power

• Mid to high speed
• Low airflow
• Low static pressure
• Low power consumption

35 dBA Noise Output

Fan_35_RPM

Fan_35_CFM

Fan_35_Pressure

Fan_35_Power

• Mid to high speed
• Low airflow
• Low static pressure
• Low power consumption