--- product_id: 256239121 title: "Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)" brand: "noctua" price: "€ 55.74" currency: EUR in_stock: true reviews_count: 8 category: "Noctua" url: https://www.desertcart.es/products/256239121-noctua-nf-a4x20-flx-computer-case-fan-computer-cooling-components store_origin: ES region: Spain --- # Ultra-quiet 14.9 dB noise Up to 4400 RPM speed 9.4 m³/h airflow Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) **Brand:** noctua **Price:** € 55.74 **Availability:** ✅ In Stock ## Summary > 🌪️ Small fan, big chill — keep your gear cool without the noise! ## Quick Answers - **What is this?** Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) by noctua - **How much does it cost?** € 55.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/256239121-noctua-nf-a4x20-flx-computer-case-fan-computer-cooling-components) ## Best For - noctua enthusiasts ## Why This Product - Trusted noctua brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Award-Winning Design:** Flow Acceleration Channels boost airflow efficiency while maintaining silent performance - • **Precision Cooling Power:** Compact 40x40x20mm size fits tight spaces like 1U servers and routers - • **Versatile Compatibility:** Perfect for desktops, NAS, switches, and DVRs—cool every critical device - • **Whisper-Quiet Operation:** Advanced acoustic optimization keeps noise at a barely-there 14.9 dB - • **Complete Installation Kit:** Includes anti-vibration mounts, screws, extension cable, and Omnijoin adapter for seamless setup ## Overview The Noctua NF-A4x20 FLX is a premium 40mm computer case fan engineered for high-performance cooling in compact spaces. Delivering up to 9.4 m³/h airflow at speeds up to 4400 RPM, it features advanced acoustic optimization for ultra-quiet operation at just 14.9 dB. Ideal for 1U servers, routers, NAS devices, and more, it comes with a full accessory kit including anti-vibration mounts and an Omnijoin adapter for easy installation. Trusted by professionals, this fan combines award-winning design with reliable, silent cooling. ## Description Noctua NF-A4x20 FLX - NF-A4x20 FLX Computer case Fan (NF-A4x20 FLX Fan - 40mm - Warranty: 1Y) Review: Nice cooler for sff aystem - Its nice for the small pc Review: Silence - After replacement in switch, it became silent ## Features - Noctua Nf A4X20 Flx Computer Case Fan Computer Cooling Components Computer Case Fan 4Cm 3700Rpm 5000Rpm 4400Rpm - Award Winning A Series Design With Flow Acceleration Channels And Advanced Acoustic Optimization Frame For Superior, Quiet Cooling Performance - Brand: Noctua - 40X20Mm Size, Ideal For 1U Applications Or Replacing Fans In Network And Storage Devices, Routers, Switches, Nas, Etc. Or Other Devices Such As Dvr. - Includes Anti Vibration Mounts, Fan Screws, Extension Cable, And Omnijoin Adapter Set To Connect The Fan To Proprietary Fan Strips. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B072JK9GX6 | | Air Flow Capacity | 9.4 Cubic Meters Per Hour | | Best Sellers Rank | #49,254 in Computers ( See Top 100 in Computers ) #406 in Computer Case Fans | | Brand | Noctua | | Brand Name | Noctua | | Compatible Devices | Desktop, Server, Router, Switch | | Compatible devices | Desktop, Server, Router, Switch | | Cooling Method | Air | | Cooling method | Air | | Customer Reviews | 4.8 out of 5 stars 2,372 Reviews | | 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 | | Power connector type | 3-Pin | | Product dimensions | 40L x 40W x 20H millimeters | | UPC | 841500110116 | | Unit Count | 1 Count | | Voltage | 12 Volts | ## Product Details - **Brand:** Noctua - **Cooling method:** Air - **Power connector type:** 3-Pin - **Product dimensions:** 40L x 40W x 20H millimeters - **Voltage:** 12 Volts ## Images ![Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) - Image 1](https://m.media-amazon.com/images/I/71lyRpVR4OL.jpg) ![Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) - Image 2](https://m.media-amazon.com/images/I/81abh0+LmWL.jpg) ![Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) - Image 3](https://m.media-amazon.com/images/I/71NYZ3JQcOL.jpg) ![Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) - Image 4](https://m.media-amazon.com/images/I/71Ywc8LceeL.jpg) ![Noctua NF-A4x20 FLX Computer Case Fan - Computer Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) - Image 5](https://m.media-amazon.com/images/I/61xqdXxj1uL.jpg) ## Questions & Answers **Q: Whats the cfm of this fan?** A: The output, converted from 9.4 m3/h is just 5.5 cfm, very low indeed. **Q: 14.9dba at what speed?** A: 5000rpm. **Q: How many dB is this fan?** A: 14.9db(a) **Q: What is the mtbf. How many hours of life can I expect from one of these?** A: Not sure about the Mtbf, but i purchased 2 of this in Jan 2020, and they have been running 24/7 till now with no problems. Installed them in my 2 poe+ switches ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice cooler for sff aystem *by W***S on 28 March 2024* Its nice for the small pc ### ⭐⭐⭐⭐⭐ Silence *by P***W on 9 September 2020* After replacement in switch, it became silent ### ⭐⭐⭐⭐⭐ High quality *by W***B on 14 October 2020* Very good performance and quiet. I'm using it on 3D printer to cool E3D V6 hotend. ## Frequently Bought Together - Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM) - Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown) - Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.es/products/256239121-noctua-nf-a4x20-flx-computer-case-fan-computer-cooling-components](https://www.desertcart.es/products/256239121-noctua-nf-a4x20-flx-computer-case-fan-computer-cooling-components) --- *Product available on Desertcart Spain* *Store origin: ES* *Last updated: 2026-07-08*