Use this fan for my 3d printer and they are much quieter than any other fan I’ve tried.

Use this fan for my 3d printer and they are much quieter than any other fan I’ve tried.  Read Less

Well designed, and quiet, just not quiet enough in my opinion.

Well designed, and quiet, just not quiet enough in my opinion.  Read Less

Pros:* not particularly noisy, even without the low-noise adapter.* Plenty of accessories* Good packagingCons:* CFM rating isn'...  Read More

Pros:* not particularly noisy, even without the low-noise adapter.* Plenty of accessories* Good packagingCons:* CFM rating isn't as good as cheaper fans in its size class, but it still works well.I bought the Noctua NF-A4x10 FLX as an ad-hoc solution to cool an LSI 9300-8i HBA that was running at 90°C (even when the card wasn't being used) in my consumer-grade computer case.When it arrived, I was surprised to see all of the accessories. It comes with two adapters, an extension, and a speed-limiting LNA adapter.One I plugged the fan in to try it out before installing it, I tempered my expectations for what it could do for my purposes and was already pricing faster, higher air volume fans before using it.However, after sticking the fan to the card's heat sink with some mounting tape, I monitored the thermals every 10 minutes or so when the same laser thermometer used to take the first readings. To my surprise, the card sits at about 32°C now in a fairly warm room.Overall, this fan has exceeded my expectations.  Read Less

I installed this as a cooling fan on the hotend of my CR10S S5. Red to red, black to black. Can't even hear the air moving, the...  Read More

I installed this as a cooling fan on the hotend of my CR10S S5. Red to red, black to black. Can't even hear the air moving, these are so impressive.I'm debating getting one and stepping down the voltage for my Ender 5.  Read Less