Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Taiwan.
🌀 Small fan, big impact—cool smarter, not louder!
The Noctua NF-A4x20 FLX is a premium 40x40x20 mm computer case fan delivering up to 4400 RPM with ultra-quiet 14.9 dB noise levels. Engineered with award-winning flow acceleration channels and acoustic optimization, it’s perfect for compact setups like 1U servers, routers, and NAS devices. Comes with a full accessory kit for easy, vibration-free installation, making it the go-to choice for professionals demanding silent, efficient cooling in tight spaces.
| ASIN | B072JK9GX6 |
| Air Flow Capacity | 9.4 Cubic Meters Per Hour |
| Best Sellers Rank | #11,148 in Computers ( See Top 100 in Computers ) #61 in Computer Case Fans |
| Brand Name | Noctua |
| Compatible Devices | Desktop, Server, Router, Switch |
| Cooling Method | Air |
| Customer Reviews | 4.8 4.8 out of 5 stars (2,368) |
| Item Dimensions L x W x H | 40L x 40W x 20H millimeters |
| Manufacturer | Noctua |
| Material Type | Plastic |
| Maximum Rotational Speed | 4400 RPM |
| Model | NF-A4x20 FLX |
| Noise Level | 14.9 Decibels |
| Number of Items | 1 |
| Part Number | NF-A4x20 FLX |
| Power Connector Type | 3-Pin |
| UPC | 841500110116 |
| Unit Count | 1 Count |
| Voltage | 12 Volts |
W**S
Nice cooler for sff aystem
Its nice for the small pc
P**W
Silence
After replacement in switch, it became silent
W**B
High quality
Very good performance and quiet. I'm using it on 3D printer to cool E3D V6 hotend.
A**L
Super silent, buy it
A**R
I used this to replace the fan in my hub. Keeps things cool.
C**N
I have fitted these, blowing, into my Ubiquiti UniFi USG-Pro-4 and I can report the high pitch whine is now gone. Pretty handy when you don't have a rack out of the way of habitual areas! Only been installed an hour but so far so good, and I chose to use the noise suppression mounts, they aren't recommended for this application but I wanted to try it and the resonance from the metal cover is now much more subtle. Running these fans without a cover show they are actually virtually silent, but obviously, it's not recommended to run this device with the cover off (airflow etc)!
R**S
Fan was so quiet I had to visually check to make sure it was spinning. It comes with both a low noise adapter and an ultra low noise adapter. I can't imagine needing them since it is barely audible at full speed. Certainly the quietest fan this size that I've ever encountered.
F**Z
Desde el empaquetado del producto se siente la calidad, viene con todos sus accesorios, se siente de muy buena calidad. Es silencioso y tiene buen caudal de aire. Lo usé para reemplazar el ventilador de un XVR Dahua, el ventilador original es de 2 pines, este ventilador noctua viene con sus accesorios para poder hacerlo de 3 pines a 2 pines. Los resultados fueron demasiado superiores al ventilador original, mucho más caudal de aire y sobre todo muy silencioso. Estoy muy satisfecho con la compra.
Trustpilot
5 days ago
3 weeks ago