4 ms·
> There is no need to spend extra for 140. A quality 120 is negligibly higher CFM then a quality 140 at the same RPM. Where do you get these numbers from? Tak
by Dunedan 5y ago
> There is no need to spend extra for 140. A quality 120 is negligibly higher CFM then a quality 140 at the same RPM.
Where do you get these numbers from?
Take Noctua fans for example, which are arguably some of the best on the market. A 140mm NF-A14 PWM [1] does have a throughput of 140.2 m³/h at 1,500 RPM, while a 120mm NF-A12x25 PWM [2]does only have a throughput of 84.5 m³/h at 1,700 RPM. And that even with the NF-A12x25 PWM being a newer generation fan than the NF-A14 PWM!
[1]: https://noctua.at/en/products/fan/nf-a14-pwm/specification https://noctua.at/en/products/fan/nf-a14-pwm/specification
[2]: https://noctua.at/en/products/fan/nf-a12x25-pwm/specification https://noctua.at/en/products/fan/nf-a12x25-pwm/specificatio...
- aidenn0 5y agoThanks for that, I'm apparently just wrong. I should point out that the 140mm doesn't get the extra airflow for free, as it's about 2dB louder. The lower frequency makes up for that though, and you will probably see more than a 2dB rise in noise for adding a second 120mm fan so it is still a net win at any given CFM.
- fomine3 5y agoSome review says that A12x25 + 14cm adapter is superior than A14 for silent setup. I can confirm that since I have both A12x25 and A14. A12x25 is impressive but a bit disappointed for A14's bass noise. dBA isn't a perfect metric how human feel the sound annoying
- Dunedan 5y agoI agree, but I'm confident Noctua will tackle that with the next iteration of their 140mm fans which is currently scheduled to be released in Q1 2022 [1]. [1]: https://noctua.at/en/product-roadmap https://noctua.at/en/product-roadmap