Does what it says on the tin, not strong enough for servers.
2 February 2015
Summary: Purchased 4 of these to replace the noisy fans that came in my Nortel Baystack 5510 48 Port switch. The stock fans pushed 10.1CFM at 32.5dB, where these fans push 4.86 CFM at 19.56 dB. So yes, they make less noise, but sacrifice too much pushing power. My idle temps went from 37c on stock to 50c with these fans. That's the top of the thermal envelop for this switch.
Summary: I'm probably an outlier, but mine vibrates a lot more that it should. I had to cut a piece of anti-vibration mat and mount it with that in between the can and the panel. I'd return it for a new one, but at $5 or so, is it really worth it?
Summary: Usage ===== This is 40mm x 20mm fan. I bought it to replace a loud fan in the Mini-ITX power supply in my home server. This is the common size fan for a Mini-ITX PSU. Noise ===== The fan is fairly quiet, but certainly not silent, I have built several very quiet home theater PCs and have experience with quiet fans. 40mm fans are typically very noisy as they tend to spin at a high speed.
Summary: This is a great fan! It worked just fine out of the box and is very quiet. This fan would be good for a lot of purposes, one of which being a small case-mounted cooling fan for a Raspberry Pi. So why did I give it 4 stars? I purchased two of these fans for my 3D printer. One to go on a motor to keep it cool during long prints and the other to focus air at the extruded plastic.
Extremely quiet! But will it remain quiet for all 30000 hours?
J. Dlouhy, Amazon
7 August 2014
Summary: Ordered two of these for an older Mini ITX - Atom 330 based Shuttle machine. The PS is external, the only fan in the case (a 40x40x10 attached to the north bridge heat sink) was well past its prime. I had already added an additional 40x40x20 fan on the wall of the case - but that SUNON model was about 3 times as loud as these fans with the same air flow. I ripped out the old units and installed two of these. WOW! Decent air flow without any of the noise. Very pleased!
Summary: I purchased three of these 40mm fans to replace three noisy fans in a 24 port Netgear port smart switch. These fans, do not come with the third wire for variable control, so they run at maximum rpm all the time. Even with three of them, my switch almost sounds fanless. If your fan does not power up initially, make sure to check and move the initial pin configuration around.
Worked great to cool down my Northbridge. Scythe is a reliable brand.
Peter Chan, Amazon
17 July 2014
Summary: Put this on my northbridge of my gigabyte DS3L motherboard with a zip tie. Scythe fans are quiet and seem to last a long time without breaking down. Something you need on a machine that is running all the time.