Arctic P12 Max Showdown – Black (DBB) vs White (FDB)

Test Methodology

I use an LW-9266 Fan PQ performance measurement apparatus to evaluate cooling fans. This is a highly sophisticated scientific instrument 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:  Bruel & Kjaer Type 4231
  • Data Logger: Picoscope TC-08
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2 thoughts on “Arctic P12 Max Showdown – Black (DBB) vs White (FDB)

  1. First of all, many thanks Aris!
    Well, I was expecting bigger difference at lower RPMs. In the higher I expected very similar results, as it is, because the main source of noise, which covers other sounds, is created by a moving air mass that radiates a sound wave into the environment. And since the geometry of propeller is the same, there should be no major differences.
    This 2nd DBB fan is not so disturbing at 10% (although it’s very near) as the 1st DBB (spike at 5 kHz). However, at 25% it is even more annoying than 1st one because of the harmonics/resonance, which starts between 2nd and 3rd second in the recording.
    FDB has much nicer sound at 10% and 25% PWM level.
    One note: I have one hypothesis as to why the 1st DBB has higher power consumption than the 2nd. The spike at 5 kHz reminds me of grinding/scraping metal on metal. The bearings may not be sufficiently lubricated, or the tolerance of the bearing balls is not tight enough … but its only a guess 😀

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