Noctua chromax.Black.swap, Premium Quiet Fan, 4-Pin

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 CNoctua 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 CRESULT: 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.

In all honesty, I have hated even the idea of using 80mm fans in any computer build. Without fail they have been much louder than the 120mm, 140mm, 180mm and 200mm fans. And due to the loudness factor, I have abhorred even the thought of using 80mm fans.I have built more computers in the last quarter of a century than I can remember. Most of them were quality gaming computers and I excelled in building water cooled gaming rigs.Fast forward to today. I had to build a computer with very specific criteria. It had to be a mini-itx, had to look nice, had to be quiet and most of all, had to remain cool.These little Noctua NF-A8 PWM fans got the job done like 1,000 times better than I could have imagined.They even included anti-vibration pads with all sorts of different beautiful colors for color coordination purposes.Yeah, I had to pay a little bit more than crap fans, but these were totally worth it. My aversion to using 80mm fans is now over thanks to these little guys.Thank you Noctua for hitting the ball out of the park!Definitely a homerun.

Used these to replace noisy fans in a synology NAS, they are very quiet. Highly recommend. Also used a different size (same brand) for a firewall, also very quiet.

Easily installed and maintains the quality that Noctua is known for. Good airflow and makes a world of a difference in the Optiplex I built.