Advertised Vs. Real Performance
This is probably the most crucial page, showing how accurate the data provided by the manufacturers/brands on their products is. Since nobody could verify these numbers so far, it was an open field for every brand to declare whatever it wanted, but this stops now. I should also note that I strictly follow the specific guidelines (ISO7779: 2018) for taking noise measurements in information technology and telecommunications equipment.
In the table below, anything in Red means bad news, while the Blue fonts are good!
| Performance Metric | Advertised Performance | Real Performance | Difference |
|---|---|---|---|
| Max Speed (RPM) | 1900 | 2036 | +7.16% |
| Max Input Current (A) | 0.4 | 0.16 | -60% |
| Max Power (W) | 4.8 | 1.93 | -59.79% |
| Qmax (CFM) | 78.4 | 80.58 | +2.78% |
| Pmax (mmAq) | 2.36 | 2.03 | -13.98% |
| Max Noise Level (dBA) | 29.3 | 35.7 | +6.4 dBA |
The maximum speed is higher, and the power consumption is notably lower than what is quiet! states, which is good, of course. Airflow is higher, but the real static pressure value is lower than the advertised. Lastly, I measured 6.4 dBA higher noise output.
Tests show the white Silent Wings 4 140mm is noisier than the black version?
Epilogue
The high-speed version of the be quiet! Silent Wings 4 120mm
-> typo: should be 140mm
True.