Noctua NF-A9 FLX, Premium Quiet Fan, 3-Pin (92mm, Brown)

Excellent fans which are also very quietThis one was for an old NAS but have used them to replace noisy fans on radio transceivers as wellQuality is excellentWorth that little bit extra every time10/10

I replaced a Synology DS119 with a DS220+The DS119 was VERY quiet.In comparison the DS220+ is noticeably louder.I'm using with SSDs so the only sound is the fan.So I replaced it with the excellent Noctua NF-A9 FLX fan which is a real premium quality fan.However on the default quiet fan mode setting in the DS220+ control panel the fan struggled to work. It would start off fine but eventually just stop moving.This was true in the medium fan speed setting on the DS220+However in the maximum fan speed setting it worked fine but was much noiser than the original fan set up!The Noctua fan comes with two speed attenuator cables:Low-Noise Adaptor (L.N.A.)Ultra-Low-Noise Adaptor (U.L.N.A.)I tried it with the low noise cable and it worked fine and was quieter.I tried the Ultra low noise cable and that worked too and was super quiet.I stuck with the ultra low noise cable and the DS220+ has been running for a day now with no fan issues and the temperature inside the case is nice and cool. Varies between 30 and 39 degrees.In terms of noise the set up is marginally quieter than the Synology fan. The Synology fan had a very minor rattle. The Noctua is super smooth with no rattle.Its not silent but its pretty quiet.

I had been experiencing an episodic (and erroneous) fan error on my DS218 which was only solvable by setting the fan to max speed, a solution which was unacceptable due to the noise it created. I replaced initially with another generic fan but the error recurred so took a gamble on replacing again with this more expensive fan. Happy to say it has solved the issue completely. This is clearly a premium product and comes with a number of leads and much better construction quality. I installed with the supplied ultra low noise adaptor (which slows the fan down) but put the synology DSM setting on full fan speed. I have had no error messages on the synology in the 48 hours since install (I was getting them hourly previously) and the fan is pretty much silent. Its also doing a good job at keeping my drives cool at 30c.

I purchased this Noctua NF-A9 FLX fan for my Synology DS215j NAS to replace the installed fan which had developed a noise. Even when this NAS is in sleep mode the fan still runs so it was becoming quite noticeable in a quiet room.I've purchased a few Noctua fans in the past and they are great quality products. This fan came with a nice selection of accessories, including some low noise adaptors, a 4 pin molex to 3 pin power adapter, a 30cm extension cable and some anti-vibration silicone mounts. I didn't need any of the extra accessories but it's a nice bonus and will make useful spares.After fitting the fan into the NAS it's nearly silent now - I would go as far as to say it is quieter than it was from new! I can feel the air being pushed out the back so even though it's very quiet it's still providing excellent air flow.This fan comes with a 6 year warranty which goes to show how much confidence Noctua have in their products.The colour scheme is definitely not to everyone's tastes but as this fan is inside the NAS and not on show it's not a problem.Highly recommended.

I needed a 19mm fan to replace my noisy fan thah came with my pc build.The Installation was quite easy - the 3 pin fitted onto the 4 pin slot without any issues and it is so quiet (a light hum). Happy with purchase.

Far superior to cheaper alternatives. Well worth the money

Great fan as all Noctua fans usually are. Small issue was that I could not use this fan to replace the fan that comes with the Noctua low profile CPU cooler since the screws provided only allow for case mounting.

I purchased a couple of these to replace the stock fans in Synology DS920+ NAS box. The stock fans were pretty noisy, even on quite, but after replacing them with 2 of these Noctua NF-A9s the NAS is now very quiet and I have to check to make sure it is on!If you are interested in how to replace the fans in a DS920 then go to YouTube and search for "replace sinology ds920+ fans". The #1 result for me was by "Max McEvan" and was the tutorial I followed.I hope this helps.