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Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A6x25 is a highly optimised, premium quality quiet fan in 60x25mm size. The PWM version sports Noctua’s custom designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise-Adaptor to reduce the maximum speed during PWM control from 3000 to 2300rpm. Its superb running smoothness, SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.
AAO frame
Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency.
Reduced motor hub size
Thanks to its streamlined, compact motor design, the NF-A6x25's motor hub is smaller than many conventional 6cm fans. This allows for more blade surface area and thus contributes to the NF-A6x25's superior airflow and pressure performance.
SSO2 bearing
The NF-A6x25 features the further optimised second generation of Noctua's renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.
Flow Acceleration Channels
The NF-A6x25 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.
Scope of Delivery
- NA-RC12 Low-Noise Adaptor (L.N.A)
- NA-YC1 4-pin PWM y-cable
- NA-EC1 30cm extension cable
- 4x NA-AV1 anti-vibration mounts
- Fan screws
Custom-designed PWM IC with SCD
Supporting fully automatic PWM speed control, the NF-A6x25 PWM uses Noctua's custom-designed NE-FD1 PWM IC that integrates Smooth Commutation Drive (SCD) technology. By providing smoother torque impulses, SCD suppresses PWM switching noises and thus makes the fan quieter at low speeds.
Carollee
2025-08-20 12:50:57
I like'em! (see pics) Got two for my pc (HP P7-1010) to get more air moving in there. Also bought one of the 40x40x20 little guys to get some air coming in the side vent on my tower. These things do not move very much air. But that's OK, it's all I could really do for my tower. And who cares about the color? I think they look awesome. If you want more air movement I would get the Bgears fans. Those things are about 50% more powerful than Nactua's. I know these fans are rated at 3000RPM, the Bgears I have are rated at 5000rpm and they destroy Nactua's fans. BUT! they're louder. Not annoyingly loud, but definitely noticeable. But cmon you can't spin at 5000rpm and be silent... If you look at the picture of my side panel you'll see what I did. My pc was bought all in one at Staples back in 2011. I've upgraded everything possible. Best cpu my mobo will take(AMD Phenom II X6 1065T 95watt)(32gb RAM Kingston Hyperx Fury)(2gb EVGA Nvidia GeForce gtx 750 Ti)(two Solid State Drives by Western Digital, a 500gb, and 1TB)(Seven USB 3.0 ports (pcie card))(an Antec A30 Heatsink fan)This thing is my baby. I know it's not a custom build. But I've had it for almost 10 years and it runs fine still. I can run almost any game as of 2020 without issue. Audio and Video editing (Pro Tools & Sony Vegas Pro HD) run flawlessly. I've turned a manufacturers system into a monster. And I hope to get another 10 years out of it. But I do plan on finally building my first custom build next year. Sorry for the rambling lol I don't know why I do this on reviews lolNactua is probably the best in quality. I recommend you buy these bad boys. Or whatever size you need. Get'em!
jzp
2025-08-10 16:23:50
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.
Kevin
2025-07-08 18:07:25
This little fan is extremely quiet - even at 1800rpm! Max RPM is 3000. Used as additional intake for my Lian Li PC-O11DW 011 Dynamic case (mounted in rear) to throw some cooler air near the M.2 SSDs.
christopher waite
2025-05-30 11:04:56
Turned fans from a large storage array from being super loud to nice and quiet. Amazing fans.
Don Shipp
2025-05-15 18:35:01
My home build computer has seen three or four case fans over the last ~18 years but the Noctua fans I've installed this year have made it quieter than it's ever been.First installation was replacement of an old, noisy 80mm fan with a new Noctua fan in front to blow into the case. It's practically noiseless but I failed to realize I then had poor air flow through the case. The power supply fan was insufficient to exhaust what the front case fan supplied. My CPU cooler isn't extremely loud but it was still noticeable. I then installed this 60mm fan on the back, using the Y-splitter to coordinate fan speeds. Both were mounted using the Noctua rubber pull-throughs to isolate them from the case.The result has been excellent! The fans run around 20-30% speed and hold the motherboard temp around 95 degrees F where before it was mostly 25-35% and 105 deg F. Better, the AMD Wraith CPU cooler fan runs around 20-30% with the processor temp holding in the mid-90s F (~35 C), occasionally bouncing up around 115 deg F (~45 C) with the fan speeding up for only a second or two to pull it back down in the 90s again. Previously, I never saw CPU temps below ~105 deg F and fan speed under 30% with noticeable noise that's no longer there. All it took was better air flow through the computer with fans that are *_almost dead silent_*.I have a commercial grade UPS under my desk with an internal fan that makes enough noise to now be noticeable. That's next on my "Quest For Quiet." In my opinion, Noctua fans are the best way to go. Why does it matter they're wierd colors? They're worth the money because they do the job!Oh, yeah - did I say they're *_almost dead silent_*?.
J Zhang
2025-04-28 18:05:37
Pretty much what you would expect from noctuas. The fans are quiet and move air well. No complaints
Brad
2025-04-20 13:06:20
Same image I used in the review of the other fan, I have this one paired with another Noctua fan, both for exhaust. They are quiet and move a ton of air, keeps the case nice and cool, My custom case I had been working on for a while and had 2 older CPU fans as exhaust fans, which is why they were different sizes, so I stuck with the size difference with new fans, that is why they are different size.
Alberto Gómez
2025-04-10 14:39:07
Pues no hay mucho que decir, es algo caro pero es simplemente un excelente ventilador, desde el empaque puedes ver la calidad de primera, con muchos extras como un cable divisor, una extensión y un cable para limitar la velocidad por si requieres que sea aún más silencioso pero dudo que a alguien le haga falta porque en verdad es super silencioso considerando que es de 3000rpm, su único "pero" es que es algo grueso.
Kunde
2025-03-10 17:14:35
Wentylator jest bardzo cichy i mega wydajny. Nie jest tani ale warto zainwestować w jakość, bo to się opłaca.
Ron
2025-01-29 11:13:52
Wenn immer möglich, verwende ich für CPUs Lüfter von Noctua.Diese haben sich aufgrund ihrer Qualität bestens bewährt. Sie arbeiten auch nach mehreren Jahren noch zuverlässig. Trotz hervorragender Kühlung gehören sie zu den leisesten ihrer Klasse.Obwohl ich diesmal nur einen kleinen Zusatzlüfter benötigte, entschied ich mich auch diesmal für ein Noctua -Produkt.Nun sorgt er in meinem Netzwerkschrank für einen kleinen seitlichen Luftstrom, da sich der ursprünglich lüfterlose Switch nach Einbau zweier SFP-Module doch sehr aufheizte. Die Lösung ist zwar optisch nicht allzu professionell, erfüllt aber voll seinen Zweck.Fairerweise sollte man erwähnen, dass die Lüfter nicht zu den preiswertesten gehören. Doch aufgrund ihrer Qualität ist auch hier das Preis -/ Leistungsverhältnis völlig ok, zumal Schrauben, Gummiverbinder, Anschlusskabel und Kurzbeschreibung zum Lieferumfang gehören.
Deg
2024-12-14 14:42:51
Värd varenda krona. köptes till en server med gamla fläktar. efter byte så blev servern svalare och helt tyst. rekommenderas!
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