Test Methodology
I use an LW-9266 Fan PQ performance measurement apparatus to evaluate cooling fans. This highly sophisticated scientific instrument was made in Taiwan by Long Win.
Fan Testing Machine Technical Specifications:
- Manufacturer: Long Win Science & Technology Corporation
- Air Flow Rate: 2.4 – 250 CFM
- Accuracy of Air Flow Rage: <3.5% INFS
- Repeatability error: < 2%
- Static pressure: 0-20mmAq (100mmAq with the high static pressure throttle device)
- Overall Dimensions: 0.7 (W) x 2.2 (L) x 1.6 (H) m
- Power Source: 220VAC, 5A, Single Phase, 50/60Hz
- Based on Standards: ISO 5801-2007, AMCA 210-0, ASHRAE 51-2007, IEC 61591-2005, GB/T 1236-200
Besides the Long Win machine, I also use the following equipment.
Testing Equipment:
- Noise Test Environment: Hemi-Anechoic Chamber with 6 dB(A) noise floor
- Conditions: 25 (+-2) degrees Celsius, 40-50% humidity
- Sound Analyzer: Bruel & Kjaer 2270-S G4
- Microphone: Bruel & Kjaer Type 4955-A
- Mic Calibrator:Ā Bruel & Kjaer Type 4231
- Data Logger: Picoscope TC-08
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Kinda surprised you didn’t include the NH-D15. The NF-A14x25 is the successor to the D15. Wouldn’t you want to know how much better it is to the D15? Totally lame review.
Do you understand what you write? You confuse a cooler (D15) with a fan?
As an example: https://postimg.cc/67WQtBP7 (link to https://postimages.org)
It may hurts eyes, sorry š
Brighter colors ā NF-A14x25 G2, 50% PWM
Dimmer ā Silent Wings 4 Pro 140, Mid Range, 50% PWM
It looks like the NF-A14x25 G2 is superior to the SW4 Pro as a fan for the case (Iām guided by the graph from Noctua: https://noctua.at/pub/media/wysiwyg/A14_further_reading_1_Highly_optimised_PQ_curve_for_all_applications.png) and for the radiator of the tower cooler, but loses as a fan for the radiator, which generally corresponds to tests on other resources.
Greetings!
Thank you so much for your reviews, everything is simple, technologically advanced and accurate.
I would like to suggest adding a P/Q Graph for 20, 25 and 30 db to compare fans in the “Normalized Noise Tests” category.
It would probably be more visual, and correct, from the point of view of testing performance close to real.
Have you considered this option?
As an example: https://ibb.co/4SSw81X
It hurts my eyes, I’m sorry š
Brighter colors – NF-A14x25 G2, 50% PWM
Dimmer – Silent Wings 4 Pro 140, Mid Range, 50% PWM
It looks like the NF-A14x25 G2 is superior to the SW4 Pro as a fan for the case (I’m guided by the graph from Noctua: https://noctua.at/pub/media/wysiwyg/A14_further_reading_1_Highly_optimised_PQ_curve_for_all_applications.png ) and for the radiator of the tower cooler, but loses as a fan for the radiator, which generally corresponds to tests on other resources.