Average Noise
The average noise is high for the standards of this category.
Fan Noise & Speed Maps @ 28-32 °C
[115V] The unit’s noise map looks weird. To stop the fan, the semi-passive mode needs less than 65W on the minor rails and lower than 380W at 12V. High loads on the minor rails heavily affect the fan’s speed, showing that the DC-DC converters require better cooling. With more than 630W, the noise goes over 30 dBA; with more than 1000W, you enter the high-noise output region. The fan speed profile needs tuning.
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Hello,
I have a strange thing to report about this exact model.
I thought the fan on the unit I had was dying because of a somewhat scratching noise when disabling smart fan off so I ordered a replacement unit from Amazon
The replacement unit is totally different from the one that I have. I have uploaded two photos of actual units and their boxes.
https://photos.app.goo.gl/UaZksh86vbbGtET96
https://photos.app.goo.gl/CFjRCmtTqseHQDAu6
My previous unit seems to have the same pcb as in your review, only with two brown Nippon chemicon 470uf instead of your’s black Nichicon.
The newer unit seems to have:
– the fan partially wrapped in plastic in order to restrict airflow (I Guess)
– black thick heatsink similar to those of a cwt puq I had
– just one black Nichicon with 400v stamped on it and GG (M) (no micro Farad indication that I can get a glimpse of)
– different main transformer in a black monolith enclosure saying pq4040-a 2316 on it
– three big nude coils similar to those of PFC (but I am no expert)
– a fan that is even noisier (it resemble a track) when activated.
– different advertisement about efficiency and fan curve on the box (see the photo attached)
– cables pcb is disposed differently
I can attach a sound print in mp3 of both if needed.
I thought my fan was already defective but it seems this is even worse in a way. Wich one do you think would be better to keep?
ha this is super weird! The one with the lower noise I guess!