Noctua NF-A6x25 PWM, Premium Quiet Fan, 4-Pin (60mm, Brown)

Always quality fans. Worked well and quiet.

I used the Noctua NF-A6x25 PWM as a replacement for the noisy fan on my QNAP TS-212. The original fan had failed and I replaced it with a Delta AFB0612VHC also from Amazon which did not last six months before it started to make noise as well. Back then I had considered the Noctua fan but did not buy it because it was too thick -- the original fan was 0.6 inch thick and the Noctua fan is 1.0 inch thick. This time I decided to get the Noctua fan and try to make it fit. The fan could not be mounted inside the enclosure but came with four "anti-vibration mounts" made of silicone that allowed me to mount the fan outside the enclosure by just pulling the "anti-vibration mount" peg through the original fan screw holes. The fan is mounted outside the enclosure and is VERY QUIET and keeps the system cool. I had to drill a small hole on the plastic case to allow the fan wire to pass inside the enclosure. The QNAP is able to control fan speed automatically and the fan power and sensor match QNAP pin-out. I had bought the Delta fan because it was the same model as original fan but turned out to be junk. The Noctua fan is highly recommended by others so I expect it to last much longer than the Delta unit.

Excellent, high quality fan. Used it to replace the stock fan on the Corsair Airflow RAM cooler. A couple of zip ties required, but it works like a charm and is much quieter at higher speeds.

The media could not be loaded. All I can say is: shhh … can you hear it ?So, I have this server and I was not happy with how loud it was. Server was close to my desk so I wouldn’t use it because whenever the fans will spin up it was uncomfortably loud.I kept reading about the Noctua fans being quiet so I figured I’ll replace them if I didn’t like them I could always return them.Now in my server there are 6 fans including a cpu fan cooler.I replaced only the CPU fan and I was so impressed I replaced the rest.Now, on my video the phone is right up to the server so that’s the sound you hear. At the time of the video recoding the fans were spinning fast as there was a high load on the server. However I could say the fan on my network switch is probably louder than the server.Once the server returns to regular load and the fans RPMs go down it gets even quieter.There’s even an adapter to make the fans even quieter but I didn’t use it as I don’t think they are needed.I am blown away with how quiet these fans are. Totally worth the investment. I’m happy with my server as I can now use it.If you have a computer or server right in your office or work space, do yourself a favor and get these fans. You will hear all kinds of noises that you didn’t even know where there. Lol !Five stars for Noctua !! 👍🏽

Materiales de calidad, viene con muchos accesorios y súper silencioso!

Silent at lower RPMs but gets relatively loud once you hit a certain breakpoint.

I bought this as a gpu cooler for my Alienware X51. Works well without any issues.

I got s pair of these to quiet down a 2u server for home use, this one had dual cpus with 60mm fans on each I thought easy swap for quieter ones no big deal . Well the new fans are very quiet and look to be well made however that quiet appears not to be by design but by just making them very slow and weak. cfm is about 13~15 vs the 57 the stock cooler had which we can see by the .08a vs .57a power draw. So if your application needs decent airflow and quiet these are not the fans for you. if you just need slight airflow and basically no noise these are going to work well. in my case the cpu's hit 150+ after a few min and its a no go they can't cool them I need more airflow.