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Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)

4.8 out of 5 stars 8,995 ratings
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Amazon's Choice in Computer Case Fans by Noctua

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  • Premium quiet fan, 40x40x10 mm, 12V, 3-pin Molex, 4500/3700 RPM, max. 17.9 dB(A), >150,000 h MTTF
  • Award-winning 40x10mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
  • Ideal replacement for noisy or broken 12V 4cm fans in 3D printers, DVRs, NAS, switches, routers, other network and storage devices, etc.
  • 3-pin 12V FLX version can be run 4500 or 3700 rpm using the supplied Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation
  • Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

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Customer Rating 4.8 out of 5 stars (8995) 4.8 out of 5 stars (2988) 4.3 out of 5 stars (742) 4.3 out of 5 stars (742)
Price $13.95 $13.95 $13.99 $10.49
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Sold By Noctua Cooling Solutions Noctua Cooling Solutions Conisy Conisy
Item Dimensions 1.57 x 1.57 x 0.39 inches 1.57 x 1.57 x 0.39 inches 0 x 0 x 0 inches 4.72 x 4.72 x 0.98 inches
Item Weight 5.60 ounces 3.52 ounces

Product Description

flx

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x10 FLX is a highly optimised, premium quality quiet fan in 40x10mm size. Smooth Commutation Drivetechnology and Noctua’s reference class SSO2 bearings ensure superb running smoothness and excellent long-term stability. Topped off with modular cabling and a Low-Noise Adaptor and OmniJoin Adaptor Set,, the NF-A4x10 is a premium choice for the highest demands.

NF-A4x10 PWM NF-A4x10 FLX NF-A4x10 5V PWM NF-A4x10 5V
NF-A4x10 PWM NF-A4x10 FLX NF-A4x10 5V PWM NF-A4x10 5V
Connector 12 V 12 V 5V 5V
Voltage 4-pin PWM 3-pin 4-pin PWM 3-pin
RPM: Max: 5000 / Min: 1000 4500 Max: 5000 / Min: 1000 4500
RPM with L.N.A. 3700 3700 - -
Acoustical Noise 19,6 dB(A) 17,9 dB(A) 19,6 dB(A) 17,9 dB(A)
Acoustical Noise with L.N.A. 12,9 dB(A) 12,9 dB(A) - -
Size 40x40x10 mm 40x40x10 mm 40x40x10 mm 40x40x10 mm

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Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
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Customer reviews

4.8 out of 5 stars
4.8 out of 5
8,995 global ratings

Top reviews from the United States

Reviewed in the United States 🇺🇸 on December 11, 2013
Reviewed in the United States 🇺🇸 on March 4, 2019
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5.0 out of 5 stars Noctua Is My Server Noise Savior
By Jern on March 3, 2019
For some time these fans have been firmly known in the universe of custom water cooled PCs with glowing lights and fancy cable wrap for gaming and so forth.

Now, I’m not that kinda guy but over the years I’ve purchased dozens of these these either as 3-pin or 4-pin PWM as well as the a4x20 model and so on and absolutely love them.

Here’s why:

I work from home and also have a home lab with a lot of enterprise equipment that would be traditionally found in a Server farm. If you’ve ever been in a Server room, you know how loud we are talking here. These manufacturers simply cram in the cheapest, biggest, loudest fan they can find. ‘Better to protect the hardware’ is their line of thinking. But, why can’t we have it all?

A lot of people with Server gear at home mitigate this issue by buying an incredibly expensive and large soundproof Server Cabinet. Me, I’d like to handle the issue at the source if I can manage close to the same airflow using more quiet fan technology. Keep in mind I said close to. You won’t be able to get the same CFM as a 28mm San Ace running at 7,200 rpms but then again you may not need it. However a Noctua at 4,700rpm could be more than adequate. In a home environment there’s much more control over various active / passive cooling methods and you won’t see necessarily the same kind of workload. Also, ive found that even 2x a4x10 at 4,700rpm is quieter (and the noise is of a less irritating pitch) than some of the 7,200rpm and up fans I’ve encountered.

Anyhow, while the benefits are great you also must be responsible for fine tuning for your application and paying close attention to system / internal temperatures to ensure the quiet fans are adequate. This could mean a better layout in the chassis, getting better airflow in your rack, heatsinks, and so on... not just fans. So, consider that my disclaimer. Use your head and get the data you need to make an informed decision.

If you know what your doing the Noctua makes retrofitting a breeze and comes with just about everything you could concievably need to shoe it in to any kind of build / scenario you can think of. The extras every Noctua comes with may seem excessive to some, but even if you don’t use them immediately they’ll save you in a pinch if you keep them in a spares drawer.

In almost every scenario I’ve experienced excellent airflow, huge noise reduction and not a single meltdown thus far. Whenever I’ve done a before and after and clocked temperatures I’ve seen this particular 4,700rpm fan outperform generic faster spinning fans that supposedly have superior CFM. Instead of using the low noise adapters I frequently utilize a separate manual fan controller so I can dial in just the right mix of noise / speed / airflow for a given application. See the photos I’ve provided for where I’ve done exactly this with Supermicro M28SACB cages, disabling the on board fan control. However, you can also get a PWM fan (I’d use the a4x20 in that case) and use Supermicro’s fan and temperature control features.

So, even though it’s a home environment the use cases aren’t mild. I’m talking 48 disk raid arrays that I’ve gotten cool as a cucumber AND quiet as a church mouse.

In the other photo I posted it’s my latest application retrofitting 4x A4x10 into a Sonnet Tech xMac mini rack mount Server. I’ve also successfully used these fans or similar models in all kinds of other gear. Again, doing a before and after of internal and drive temps is the only way you can determine if this solution can work for you. Don’t be careless- heat is a noble foe.

Noctua, I don’t know what I’d do without you. My world would be unbearably loud.

However, one small complaint Noctua if you’re listening: you’ve moved from the standard silicone vibration mounts to what you call the NA-AV3. This is the first time I’ve received these so I’m assuming it’s a fairly new change. I find them a bit fiddly and less easy to use compared to their predecessor. It also makes it more difficult to shoe-in with various retrofits because it has no flat side.... although I can work around it. I’m guessing they help with some use case I’m unaware of because I don’t see the utility at all in the change. Also, the stock at amazon seems to be a variety of the older and newer models as it’s been a toss up which kind I wound up with on my last order.
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5 people found this helpful
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Reviewed in the United States 🇺🇸 on July 12, 2022
One person found this helpful
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Reviewed in the United States 🇺🇸 on September 20, 2022
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5.0 out of 5 stars Great for Original Xbox 1.0 - Needs a special plate
By James Buonopane on September 19, 2022
I installed this into my original Xbox with a 1.0 motherboard. The original fan is terribly loud and proprietary. I used this in combination with a special plate from RetroFrog and it works perfectly.
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Reviewed in the United States 🇺🇸 on September 5, 2022

Top reviews from other countries

Fabien
3.0 out of 5 stars Mouai
Reviewed in France 🇫🇷 on February 21, 2019
230 people found this helpful
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Tanja & Daniel
5.0 out of 5 stars TOP und extrem Leise (3D Drucker Anycubic i3 Mega u. Jgauroa A5)
Reviewed in Germany 🇩🇪 on October 23, 2018
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5.0 out of 5 stars TOP und extrem Leise (3D Drucker Anycubic i3 Mega u. Jgauroa A5)
Reviewed in Germany 🇩🇪 on October 23, 2018
Ich habe mir diese Lüfter für den Umbau meiner 3D-Drucker gekauft, da ich diese auf Leise Drucker umbauen wollte. Vom Lieferumfang und der Verpackung war ich sehr begeistert, es sind sämtliche Kabel Adapter und Halterungen enthalten.
Die Lüfter sind extrem Leise und sehr leistungsfähig. Ich habe bereits zwei Drucker umgerüstet Jgaurora A5, dieser hat 24V hier habe ich einen 240-Ohm Widerstand (in Reihe zum Lüfter) mit einer Leistung von 2W eingebaut (funktioniert Super) und einen Anycubic i3 Mega (12V).
Ich nutze die Noctua NF-A4x10 für das Hotend (Bauteil und Hotend Kühlung) und den Noctua NF-A4x10 für die Kühlung der TMC2130 Treiber. Seit dem Umbau sind die Lüfter nicht mehr zuhören.

Positive
+Sehr Hochwertige Verarbeitung
+Super Leise
+Gewebeschutz an der Anschlussleitung
+Umfangreiches Zubehör
+Leistungsstark

Negative
-Keine

Mein Fazit: Ich bin sehr zufrieden mit diesen Lüftern, ich habe sie jetzt ca. 2 Monate fast durchgehend im Einsatz. Anfangs habe ich wegen des hohen Preises gezögert, jetzt bereue ich diesen Kauf aber in keinem Fall.
Tipp für alle 3D druckfreunde: Bei dem Jgaurora A5 habe ich mit der neuen Bauteilkühlung ein sehr viel besseres Druckbild, die Kühlung scheint wesentlich besser zu sein.
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Michi
5.0 out of 5 stars DER Lüfter fürs Hotend am 3D Drucker :)
Reviewed in Germany 🇩🇪 on October 27, 2018
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5.0 out of 5 stars DER Lüfter fürs Hotend am 3D Drucker :)
Reviewed in Germany 🇩🇪 on October 27, 2018
Da ich meinen 3D Drucker (AM8 mit MGN12 Linear Lager) immer weiter optimiere und nun auch an der Lautstärke angelangt bin hab ich mir für die Hotend Kühlung den Noctua NF-A4x10 FLX geleistet ;)
In erster Linie ging es mir um die Lautstärke da der originale 30x30 Lüfter für das E3D V6 Hotend sehr laut ist hab ich mir hier mal die größte Verbesserung erwartet - und ich wurde nicht enttäuscht ;)

Lieferung/Verpackung:
====================
Da ich in meinen PCs schon die Noctua Lüfter als CPU und Gehäuse Lüfter verbaut habe war ich mal nicht groß überrascht aber die Verpackung ist immer wieder lobenswert. Es ist alles sehr hochwertig und edel verpackt, da merkt man gleich dass man keinen China Müll in Händen hält.
Die Schachtel ist vorn und hinten aufklappbar und wird mit Filzklettern verschlossen. Darin findet man alle wichtigen Daten zum Lüfter und hat auch gleich Sichtöffnungen auf den Inhalt. Also alles sehr wertig für einen kleinen 40x40 Lüfter ;)

Lieferumfang:
- 40x40x10 Lüfter selbst
- Low-Noise-Adapter Kabel
- 3 auf 2-Pin Adapter Kabel
- 30 cm Kabelverlängerung
- OmniJoin Adapter-Set mit Kabeln und Crimps
- 4 Gummihalter
- 4 Grobgewinde Schrauben

Die Stecker, Kabelisolierungen und Beschriftungsaufkleber sind jetzt alle in Schwarz gehalten - auf den Produktfotos sind diese noch in Weiß bzw. braune Aufkleber.

Montage:
========
Wie gesagt habe ich den Lüfter als E3D V6 Hotened Kühler verbaut, deshalb habe ich die ganzen zusätzlichen mitgelieferten Zubehörteile und Adapter nicht verwendet. Bei mir ist der Lüfter direkt an +12 V am Ramps Board angeschlossen und versieht so seinen Dienst.
Ich kann aber von meinen anderen Noctua Lüftern in den PCs sagen dass das Zubehör sehr hochwertig ist und auf alle Fälle sehr gut ist!

Lautstärke:
==========
Einfach EIN TRAUM!!! :) Man hört den Lüfter unter Volllast (ohne wirklich kaum! Man muss wirklich 2 cm mit dem Ohr rangehen dass man den Lüfter hört - und ich bin nicht schwerhörig oder sonst irgendwie hörgeschädigt!

Ich habe dazu einen 40 mm Winkel-Adapter für das E3D gdruckt damit der Lüfter montiert werden kann.
Trotzdem ist die Luftfördermenge vollkommen ausreichend um das Hotend zu kühlen. Der Kühlkörper kommt gerade mal auf ca. 30° C. Hab das auf der offen Seite unter Vollbetrieb (Heatbreak auf 200° C aufgeheizt) gemessen.

Fazit:
=====
Als begeisterter Noctua Lüfter im PC Bereich (CPU und Gehäuselüfter) kann ich auch den kleinen 40 mm Lüfter ohne Bedenken weiterempfehlen! Für den Einsatz im 3D Drucker Bereich als Hotend bzw. Bauteilekühler eine klare Empfehlung von mir!
Deshalb vergebe ich auch gerne 5 gekühlte Sterne! ;)
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47 people found this helpful
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JC Denton
5.0 out of 5 stars Quality product, useful accessories, powerful for size and very quiet (although not totally silent)
Reviewed in the United Kingdom 🇬🇧 on September 24, 2019
3 people found this helpful
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S J HART
3.0 out of 5 stars Made no difference
Reviewed in the United Kingdom 🇬🇧 on October 23, 2020
One person found this helpful
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