We can state that, regardless of noise levels (indeed very high at maximum), the CPS PCCooler F9 R120 is the highest airflow fan in the 30 mm-and-below profile category. Yes, even the Phanteks T30 comes out “worse” here. However, if your priority is the highest possible airflow at low noise, the picture changes—and it’s not such a happy one, especially with obstacles. That will become clearer in the detailed analysis.
Results: Static pressure through a nylon filter
Why is a value sometimes missing for a fan? There can be several reasons. Most commonly, it’s because the fan couldn’t be regulated to the target noise level. Some fans have higher minimum RPM (or they spin slowly but have an excessively noisy motor), or they are simply slower models that can’t reach higher decibel thresholds. Results are also omitted from graphs if the impeller scrapes against the mesh of a nylon filter. In such cases, we classify the combination as incompatible. And of course, a zero in the graphs naturally appears in situations where we record an actual 0.00. This often occurs at extremely low speeds when obstacles are present or during vibration measurements.
Hi,
I don’t understand the chart Motor Power 12v 100% PWM and Fan power draw max speed.
Should they be the same watts?
One says 5.41 watts the other 15.23 watts do they rally draw that much power?
Thanks
See chapter 11, it’s explained there. 😉
https://www.hwcooling.net/en/cps-pccooler-f9-r120-rising-to-the-top-with-30-mm-of-thickness-review/11/
Yes, thank you! 🙂
In one case (Motor Power), the higher value appears because the motor, due to braking, has to overcome significantly greater resistance than it does during regular operation at 12 V or 100% PWM control (which are effectively the same). The motor power measurements are meant to illustrate the difference between the best and worst scenarios in terms of friction the fan must overcome. The operating power consumption of an older fan will be higher because friction increases over time with use—and it’s good to know how far the motor’s capabilities extend. 🙂
while we’re at it, 😉
It would probably be appropriate for manufacturers to limit max.motor power to 12W, cause many 4-pin fan headers on motherboards have max. current of only 1A, right?
…or what is your opinion on it? 😛