This was a huge disappointment
I bought this for two reasons (in order of priority): 1) the noise level, and 2) the slim profile, 15mm instead of regular 25mm. The fan that came with the case was too noisy, and I hoped that this would lower that noise. Putting in this fan doubled or even tripled that noise level. It sounded like a hair dryer on medium fan power. I went into the BIOS to check the fan speed, and it was 2040 rpm, just like it was supposed to. Tried to use a different power source, but no change. I'm not sure why other people say in their reviews that it is quiet, maybe we have different perception of what quiet is, I don't know. For me it is important that I can sit next to a computer for 15min without getting a headache, this fan gave me headache after 10min. It is almost as loud as my bulk power supply is (I'm going to change that too), and that fan is running on 4200 rpm. I don't think I have super human hearing either, rather the opposite. And someone might say that it is noise from the bearings, and as a PhD in turbine aerodynamics I can assure you that this is noise from the fan and not the bearings.
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