Arctic S12038-4K 120mm 4k RPM Server Fan

Frequency Plots

10% Fan Speed

  • Peak frequency: 800 Hz
  • 2nd Peak frequency: 1000 Hz

25% Fan Speed

  • Peak frequency: 500 Hz
  • 2nd Peak frequency: 400 Hz

50% Fan Speed

  • Peak frequency: 400 Hz

75% Fan Speed

  • Peak frequency: 250 Hz
  • 2nd Peak frequency: 800 Hz
  • 3rd Peak frequency: 500 Hz

100% Fan Speed

  • Peak frequency: 630 Hz
  • 2nd Peak frequency: 315 Hz

Signal Recordings

I have recorded the signals shown above, but please keep in mind that I’ve enabled Automatic Gain Control (AGC) to do so to make it easier for you to reproduce them. The provided recordings are only offered for aural identification purposes.

10% Fan Speed

25% Fan Speed

50% Fan Speed

75% Fan Speed

100% Fan Speed

 

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8 thoughts on “Arctic S12038-4K 120mm 4k RPM Server Fan

  1. Is that secondary impeller noticeably adding harmonics, particularly that major 3rd? I’m actually curious if this thing has sound design characteristics I might want to experiment with.

  2. Besides the thickness, is there any reason the home enthusiast should not consider these the best watercooling radiator fans for low noise? Less optimal noise frequencies than its competitors?

      1. As someone who tried using these (8K variant) fans for home PC cooling, I can confirm that clicking noise is VERY irritating already at ~1K RPM. I bought pack of 3, and each of them sounded like this – mounted, not mounted, held by hand, etc. Clicking becomes tolerable around 400-500 RPM, but listening closely they’re still pretty noisy compared to others, and at this point there’s no advantage in using these fans over anything that came pre-installed with case. Too bad, because overall they’re really cool and with such static pressure would be perfect for a crowded PC.

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