NF-A8 PWM chromax.Black.swap, Premium Quiet Fan, 4-Pin (80mm, Black)

I have recently decided to annoy my girlfriend to death by purchasing a rack cabinet for my condo office and filling it with totally unnecessary hardware like Ubiquiti switches and raspberry pis. My mistake though, was underestimating how loud a Synology rack-mount (rs1221+) NAS can be. It annoyed me 24/7 as it was in my office. I saw a reddit post recommending the Noctua fans and ordered some. So far, this is AMAZING. My NAS is significantly quieter and my office is once again bearable to be in. Decibel and Temp Measurements before and after - I was very careful to ensure no ambient noise affected the test: Stock Fans: - Fan Noise: 52dB (quiet mode) - CPU Temp: 37º C - HDD Temp: 25º C Noctua Fans: [quiet mode] - Fan Noise: 35dB - CPU Temp: 48º C - HDD Temp: 29º C [Full Speed Mode] - Fan Noise: 43dB - CPU Temp: 43º C - HDD Temp: 27º C RESULT: Noctua fans are significantly quieter than stock fans, even at full speed, they are significantly quieter than stock fans in quiet mode. Seriously, the dB readings don't do it justice, it's night and day difference in my office. HOWEVER, the drawback is clearly that they are just slightly less effective at cooling the CPU. For me, this is 100% fine, a few degrees difference keeps it within the safe operating range and the peace and quiet is amazing. Just giving you these details for full disclosure. Highly recommend these fans.

Diese kleinen Lüfter haben bei voller Drehzahl überaschend viel Druck und bleiben dabei leiser als so manches andere Modell. Richtig leise (unhörbar) sind sie allerdings nur in Kombination mit einer Lüfter-Drehzahl-Steuerung.

I used this fan to replace a much louder one on the 80mm radiator in my Mini-PC case. The fan has been much quieter while still having great static pressure for the radiator. The color matching anti-vibration pads are a really nice added feature to make the fan stick out. I've used the fan in my case for over 10 months with no issues and I'll defiantly be buying more of these fans in the future.

Tra i brand più affidabili è un prodotto silenzioso ad ogni velocità, anche quelle massime.

...cela jure moins pour le remplacement des ventilateurs plutôt bruyants installés d'origine pas Synology sur leurs serveurs. Les deux ventilateurs ont été installés sur un DS1517+, sans trop de problème, les câbles d'alimentation étant (trop) long pour cette usage. Ces modèles produise pratiquement deux fois plus de débit d'air, en étant moins bruyant, par rapport aux "YS" installés. Malheureusement, l'amélioration du NAS n'est pas aussi flagrante que lors du remplacement des deux ventilateurs du DS1513+! Depuis les DS1515+, et donc le DS1517+, malgré un ventilateur plus silencieux il reste un bruit aérodynamique, atténué, mais présent. Seul le DS1513+ pouvait se faire oublier, en mode medium, voire high. Pour mon utilisation actuelle, diminution du bruit, surtout en mode (cooling) HIGH, et température des disques dus plus faibles.