Frequency Plots (High Speed)
10% Fan Speed
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We have a significant spike at 50 Hz, most likely derived from the power grid’s frequency. The other notable frequency spikes are at 200 Hz, 400 Hz, and 2 KHz.
25% Fan Speed
The 400 Hz frequency is the highest one.
50% Fan Speed
Increased noise at 250 Hz, 500 Hz, and 1 KHz.
75% Fan Speed
The highest frequency is at 630 Hz.
100% Fan Speed
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High noise at 400 Hz and 1.25 KHz. From 125 Hz and at lower frequencies, the noise is low.
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
Pages:
When a test of the Noctua IPPC 140mm 3000RPM for have a fan to compare it ? 🙂
Sent an email to Noctua and weirdly enough I didn’t get a reply. Will talk again to my contact there.