Noctua NF-A4x20 FLX Cabinet Fan (Single Pack)

- Premium quiet fan, 40x40x20 mm, 12V, 3-pin Molex, 5000/4400/370 RPM, max. 14.9 dB(A), >150,000 h MTTF
- Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
- 40x20mm size ideal for 1U applications or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
- 3-pin FLX version provides 5000/4400/3700rpm speed settings via Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation
- Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers
- Delivery & Return
? Shipping and Risk:
- Order Will Be Shipped Within 24-48 Working Hours After the Order is Processed.
- Shipping Partners : Delhivery, XpressBees, Gati, BlueDart, Ecom Express (Depending on Availability at Your Pincode), Computech DOES NOT Have any Control over Operations of Shipping Partners.
- Delivery dates are estimates Provided By Shipping Partners. Shipping Partners are solely responsible for any kind of Delays.
- Loss or damage occured during shipping is Computech Responsibility.
- You Must Leave a Remark During Delivery to Delivery Guy About Damaged Box or Package, and Make an Un-cut Unboxing Video of the Package.
- You must notify Computech of damaged or missing items from your order within 24-hours of receiving your package
♻️ Replacement and Refund Policy:
- We accept replacement if product is defective or wrong product shipped no return or refund will be entertained.
- For gaming chairs only part replacement is applicable if the product delivered is defective or damaged, no refunds will be there for orders of gaming chairs.
- If the seal of the product is opened and the product is not faulty then return/refund will not be applicable.
- Packaging material should be kept by the buyer until the replacement window is opened as this will help them to pack the product to its original form to avoid any damage during the transit.
- Product should be packed in a proper way as it was received by the buyer, do not apply tapes or glues directly on the product or on the product box, this may lead to cancellation of your replacement request.
- All the accessories which were delivered along with the product should be returned in the same way and along with the product.
- If the payment was made through our payment gateway, then it will be refunded in same account by which the payment was done, in case of BANK TRANSFER and COD orders refunds will be done only in buyers bank account. Refunds usually takes 7-10 working days to reflect in your account.
₹1,200.00
Out of stock
Email when stock available
Feature

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x20 is a highly optimised, premium-quality quiet fan in size 40x20mm. The FLX version provides 5000/4400/3700rpm speed settings via the supplied Low-Noise Adaptors and includes the OmniJoin™ Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.

![]() |
40x20mm size Compared to Noctua’s award-winning NF-A4x10, the NF-A4x20 is twice as thick, which allows for increased static pressure performance and makes the NF-A4x20 ideal for demanding applications with high flow resistance. |
![]() |
Flow Acceleration Channels The NF-A4x20 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. |
![]() |
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. |
![]() |
Stepped Inlet Design Noctua’s Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space-restricted environments. |
![]() |
Inner Surface Microstructures With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency. |
![]() |
Integrated Anti-Vibration Pads Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard mounting systems and fan clips used on heatsinks. |
![]() |
Smooth Commutation Drive 2 The latest version of Noctua’s advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the fan remarkably quiet even at very close distances. |
![]() |
SSO2 bearing The NF-A4x20 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. |
![]() |
3 speed settings for full flexibility Providing 5000, 4400 and 3700 rpm speed settings via the supplied Low-Noise and Ultra-Low-Noise Adapters, the NF-A4x20 FLX (Flexibility) can be fine-tuned for superior airflow or maximum quietness. |
![]() |
OmniJoin™ adaptor set Many devices featuring 40mm fans use proprietary fan headers, so the NF-A4x20 comes with Noctua’s OmniJoin™ adaptor set. Just cut the original fan’s cable, fix it to the adaptor using the supplied 3M Scotchlok™ connectors and you can plug the NF-A4x20 to proprietary fan headers! |
![]() |
Extensive cabling options The fan’s short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved and the supplied 3:4 pin adaptor allows the connection of the fan directly to the power supply. |
![]() |
6-year manufacturer’s warranty Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A4x20 features an MTTF of more than 150.000 hours rating and comes with a full 6-year manufacturer’s warranty. |
| Size | 40x40x20 mm |
| Mounting hole spacing | 32x32 mm |
| Connector & pin-configuration | 3-pin |
| Cable length | 20cm + 30cm NA-EC1 extension cable |
| Bearing | SSO2 |
| Blade geometry | A-Series with Flow Acceleration Channels |
| Frame technology | AAO (Advanced Acoustic Optimisation) |
| Rotational speed (+/- 10%) | 5000 RPM |
| Rotational speed with L.N.A. (+/- 10%) | 4400 RPM |
| Rotational Speed with U.L.N.A. (+/- 10%) | 3700 RPM |
| Airflow | 9,4 m³/h |
| Airflow with L.N.A. | 8,3 m³/h |
| Airflow with U.L.N.A. | 6,9 m³/h |
| Acoustical noise | 14,9 dB(A) |
| Acoustical noise with L.N.A. | 12,2 dB(A) |
| Acoustical noise with U.L.N.A. | 8,5 dB(A) |
| Static pressure | 2,26 mm H₂O |
| Static pressure with L.N.A. | 1,75 mm H₂O |
| Static pressure with U.L.N.A. | 1,23 mm H₂O |
| Max. input power | 0,6 W |
| Max. input current | 0,05 A |
| Operating voltage | 12V |
| MTTF | > 150.000 h |
| Scope of delivery | Low-Noise Adaptor (L.N.A.) Ultra-Low-Noise Adaptor (U.L.N.A.) 30cm extension cable OmniJoin™ adaptor set NA-AV3 anti-vibration mounts Fan screws |
| Warranty | 6 Years |
| Note | ***Features, Price and Specifications are subject to change without notice. |
| Weight | 1 kg |
|---|---|
| Dimensions | 12 × 3 × 12 cm |
| Brands | |
| Fan Size | |
| FAN Speed | |
| Case Fan Pack | |
| EAN / UPC Code | |
| Warranty |
Q & A
Noctua NF-A4x20 FLX Cabinet Fan (Single Pack)
- Motherboard
- Ring Lights
- Tripod
- Video Editing Deck
- Monopod
- Power supply
- Ant Esports Power Supply
- Gigabyte Power Supply
- EVGA Power Supply
- Asus Power Supply
- Lian Li Power Supply
- MSI Power Supply
- GAMDIAS Power Supply
- SuperFlower Power Supply
- Thermaltake Power Supply
- Fractal Design Power Supply
- NZXT Power Supply
- Corsair Power Supply
- Zebronics Power Supply
- Circle Power Supply
- Cooler Master Power Supply
- Deepcool Power Supply
- Antec Power Supply
- Prolab Power Supply
- Adata Power Supply
- Elgato
- Tube Sleeves
- Lamination Machine
- Tripod Heads
- Smart TV
- Audio Amplifier
- AIO Desktop
- Circle Keyboard & Mouse Combo
- Car Washer
- Cooling System
- Air Cooler
- Liquid Cooler
- Fractal Design Liquid Cooler
- Prolab Design Liquid Cooler
- Antec Liquid Cooler
- Ant Esports Liquid Cooler
- Galax Liquid Cooler
- NZXT Liquid Cooler
- Cougar Liquid Cooler
- Phanteks Liquid Cooler
- Gamdias Liquid Cooler
- Adata Liquid Cooler
- Gigabyte liquid Cooler
- Arctic Liquid Cooler
- Deepcool Liquid Cooler
- Aerocool Liquid Cooler
- Thermaltake Liquid Cooler
- Cooler Master Liquid Cooler
- Xigmatek Liquid Cooler
- Corsair Liquid Cooler
- Lian Li Liquid Cooler
- MSI Liquid Cooler
- ALSEYE Liquid Cooler
- HYTE Liquid Cooler
- Montech Liquid Cooler
- Asus Liquid Cooler
- Dawg Liquid Cooler
- EK AIO Liquid Cooler
- Zebronics Liquid Cooler
- Cooling Kit
- Fitting
- Water Cooling Plates
- Water Blocks
- Peripherals
- Networking
- Cable Sleeves
- Docking Station
- Vacuum Cleaner
- Smart Ring
- Payment Terminal
- Cabinet (Case)
- Asus Cabinet
- Deepcool Cabinet
- Ant Esports Cabinet
- Antec Cabinet
- Prolab Design Cabinet
- NZXT Cabinet
- Aerocool Cabinet
- Server Rack (Cabinet)
- Adata Cabinet
- Cooler Master Cabinet
- Gigabyte Cabinet
- EVM Cabinet
- COCONUT Cabinet
- TAG Cabinet
- Dawg Cabinet
- Xigmatek Cabinet
- Arctic Cabinet
- HYTE Cabinet
- Phanteks Cabinet
- Corsair Cabinet
- MSI Cabinet
- Thermaltake Cabinet
- Galax Cabinet
- Circle Cabinet
- Fractal Design Cabinet
- Cougar Cabinet
- Montech Cabinets
- Zebronics Cabinet
- ICEMASTER Cabinet
- Lian Li Cabinet
- Gamdias Cabinet
- Consistent Cabinet
- Earcups
- Prebuilt Desktop
- Combo & Bundles
- Air Purifier
- Mouse
- Screen Guards
- Spike Guards
- Scanner
- Voice Amplifier
- Stylus
- Gaming Chair
- Surge Protectors
- iCue Pre
- Air Tags
- Graphics Card
- Webcam
- Security Camera
- Gimbal
- Memory (RAM)
- Laptop Bags
- Tablets
- Game Controllers
- Gaming Console
- BobbleHead
- Monitor
- Microphone
- Luxury Products
- Switches
- Accessories
- Hubs
- Smart Glasses
- Memory Card
- Wall Mount
- Screen Protectors
- Phone Holder
- Garment Steamer
- Film Cartridge
- Audio Enhancer
- Backpack
- OTG Cable
- Air Tag Holder
- converter
- Fitness Band
- Briefcase
- Writing Pad
- Cables and Chargers
- Fan Accessories
- Spike Protectors
- Phone Case
- Extension Board
- Displayport Cable
- Case Accessories
- Ethernet Cable
- Fan Hub
- Charging Dock
- DVD Writer
- Transmitter & Receiver
- Wrist Rests
- Enclosure
- Mechanical Switches
- Sound Cards
- Server Accessories
- Pen
- Keycaps
- MP3 Players
- Expansion Card
- Mouse Bungee
- Pedals
- Gimbal
- Headphone Splitter
- Audio Cable
- RGB Controller
- Audio Adapter
- Audio Splitter
- SSD Heatsink
- Receipt Printers
- light stick
- Riser & Cables
- GPU Holder
- Side Panel
- Luggage
- WiFi Adapter
- Disk Drive
- HDMI Splitter
- NVLink
- Mouse Pads
- Mic
- Monitor Stand
- Boom Arm
- USB Lights
- Phone Cooler
- Cleaning Kit
- Headphone Stand
- Vibration Mount
- Smart Bulbs
- Key Switches
- Card Reader
- Tablet Holder
- Buds
- Gaming Sleeves
- Lamps
- Gloves
- CCTV Cable
- Fans
- Keypad
- Smart Watch
- Selfie Sticks
- PlayStation Accessories
- ScreenBar
- Fan Splitter Cable
- Chassis Stand Kit
- ARGB Controller
- Power Bank
- Bracket
- HDMI Cables
- Battery
- Speaker Stand
- Cable Management
- Bottle
- CPU Cooler Mounting Kit
- Pen Drive
- Mixers
- Cables & Adapters
- Camera Battery
- Toolkit
- Remote Control
- Bluetooth Dongle
- Wifi Dongle
- Virtual Reality Headset
- Camera Accessories
- Keyboards
- Laptop Zone
- Extenders
- Digital Products
- VR headsets
- Audio Interface
- In Ear System
- Headphones
- Gaming Desk
- Antivirus
- Projector
- Projector Screen
- Electronic Devices
- Storage
- Hard Disk
- NAS Storage
- SSD
- Kingston SSD
- Acer SSD
- Samsung SSD
- EVM SSD
- Lexar SSD
- Corsair SSD
- Synology SSD
- Crucial SSD
- Sabrent SSD
- HIKVISION SSD
- Seagate SSD
- Western Digital SSD
- Adata SSD
- Zebronics SSD
- Ant Esports SSD
- MSI SSD
- MIPHI SSD
- Colorful SSD
- Apple SSD
- Gigabyte SSD
- PNY SSD
- Internal SSD
- Transcend M.2 Sata SSD
- Nvme SSD
- Samsung Nvme SSD
- Western Digital Nvme SSD
- PNY Nvme SSD
- Patriot Nvme SSD
- Acer Nvme SSD
- EVM Nvme SSD
- Biwin Nvme SSD
- Lexar Nvme SSD
- Adata Nvme SSD
- Hikvision Nvme SSD
- Kingston Nvme SSD
- KIOXIA Nvme SSD
- Zebronics Nvme SSD
- Corsair Nvme SSD
- Asus Nvme SSD
- MSI Nvme SSD
- Crucial Nvme SSD
- Gigabyte Nvme SSD
- Teamgroup Nvme SSD
- Colorful Nvme SSD
- Seagate Nvme SSD
- Transcend Nvme SSD
- Sata SSD
- PNY Sata SSD
- Patriot Sata SSD
- EVM Sata SSD
- Western Digital Sata SSD
- Adata Sata SSD
- Kingston Sata SSD
- Lexar Sata SSD
- KIOXIA Sata SSD
- Zebronics Sata SSD
- Corsair Sata SSD
- Ant Esports Sata SSD
- MSI Sata SSD
- Crucial Sata SSD
- Gigabyte Sata SSD
- Teamgroup Sata SSD
- Colorful Sata SSD
- Seagate Sata SSD
- Transcend Sata SSD
- Samsung Sata SSD
- External SSD
- Seagate External SSD
- Lexar External SSD
- Samsung External SSD
- PNY External SSD
- Western Digital External SSD
- Sandisk External SSD
- KIOXIA External SSD
- EVM External SSD
- Adata External SSD
- Kingston External SSD
- LaCie External SSD
- Zebronics External SSD
- Corsair External SSD
- Lenovo External SSD
- MSI External SSD
- Transcend External SSD
- Crucial External SSD
- Gigabyte External SSD
- Teamgroup External SSD
- Colorful External SSD
- Teamgroup SSD
- Bundles
- Smartphones
- Home Audio
- Thermal paste
- UPS
- Photo Printer
- Processor
- Laptop
- Adapters
- Streaming Accessories
- Software
- 27GS60QC-B
- A-DATA HD710M Pro
- Acer Predator Pallas Ram
- ADATA LEGEND 960 MAX ssd
- boAt Airdopes 138 TWS
- boAt Rockerz 255R Earphone
- Canon Image FORMULA DR-C225 II Document Scanner
- CL-F153-PL12SW-A
- Corsair RMe Series RM750e
- DeepCool CG530 Reversed 120mm
- DeepCool CH370 (M-ATX) Mini Tower Cabinet
- DreamBoy-WHT
- EvoFox One S
- GV-N506TWF2MAX-OC-16GD
- HD710
- HP Color Smart Tank 581 WiFi Inkjet Printer
- ICE-360-White
- Kingston KSM26SES8/8HD 8GB DDR4 2666Mhz ECC Unbuffered SODIMM Memory RAM
- LBP361dw
- Lexar 512GB NM620
- LG 34WQ650-W
- Logitech MX Brio Ultra HD 4K Collaboration and Streaming Webcam
- Logitech MX Master 4 for Mac Ergonomic Bluetooth Mouse
- MSI MD272QPW Monitor
- MZ-7L31T900
- N406T2-16D6X-178055W
- OnePlus-Watch-2R-BLK
- Patriot 8GB Viper Steel DDR4 3200 MHz SO-DIMM Memory Module
- PM893 7.68TB
- PNY NVIDIA RTX 6000 Ada Generation Graphics Card
- Portronics Toad 35 mouse
- PRIME-RX9070-O16G
- R-LT720-WHAMNF-G-1
- Rockerz 255 Pro+-BLUE
- Samsung T5 500GB
- SDXC 350V 64GB
- Seagate Backup Plus Slim 1 TB
- SO-ONSL-WLMT-PR-BLK
- SRS-XB33
- Transcend JetRam JM3200HLD-4G 4GB DDR4 3200 U-DIMM Desktop RAM
- TS32GSDC700S
- TS128GSDC300S
- TVS receipt
- U2424H
- WD My Passport 5 TB HDD
Related Products
- Shine brillianty: six individually addressable hub-mounted RGB LEDs
- Pwm control: wide speed range ideal for CPU heatsinks and radiators
- Specially designed fan blades and outer ring: produces an exceptionally uniform glow
- Ells (Long Life Sleeve) bearings: silent operation with a long lifespan
- It’s part of a triple pack and is known for its high static airflow.
- The fan features 12 Addressable RGB LEDs.
- It ensures high speeds and low noise.
- It’s a great choice for enhancing a PC’s cooling.
- It adds a touch of style with the ARGB lighting.
- Size 120x120x25 mm
- Connector & pin-configuration 4-pin PWM
- Low-Noise Adaptor (L.N.A.)
- NA-AV2 anti-vibration mounts
- Improved daisy chain design to connect 2 clusters of fans.
- SL120 V2 fan frame thickness is 28mm to provide 10% improved airflow compared to V1.
- Removable interlocking keys to provide better radiator clearance.
- Start/stop fan RPM support for a quieter environment.
In stock
- Rifle Bearing reduced noise spin and great performance
- Efficient 45.3 CFM Air Flow Performance
- 23dBA Fan Operation
- VENTO 120 ARGB Lighting Effects
- Size 140x140x25 mm
- Connector & pin-configuration 4-pin PWM
- Rotational speed (+/- 10%) 1500 RPM
- Blade geometry A-Series with Flow Acceleration Channels
- Size 120x120x25 mm
- Connector & pin-configuration 4-pin PWM
- Material Fibre-glass reinforced polyamide
- Blade geometry Heptaperf
- Cooled by Nidec GentleTyphoon
- 4-Pin PWM Connector
- Daisy Chain Capability
- Dual Bearings Efficient and Silent Performanc
- Ring + blade A-RGB LED lighting.
- Wire controller included.
- Support A-RGB motherboard synchronization.
- Balanced cooling performance and noise level
- Arctic P12 120mm PWM-controlled fan which regulates fan speed based on load
- 300-2100rpm at 12V providing a maximum airflow of 56.3 CFM
- Low-noise blades design increases airflow and minimizing fan noise
- Fluid dynamic bearing significantly extends service life
- 6-year limited warranty
- Size : 120x120x25 mm
- Connector & pin configuration 4-pin PWM
- Low-Noise Adapter (L.N.A.)
- 4 Vibration-Compensators
In stock
Crystalized ARGB Lights
Unique and unorthodox crystalized ARGB diffusers on both sides fordistinctive looks and even looks.
Hydraulic Bearing Gear Motor
Noise reduction technology & sound absorbing technique brings down the noise to provide you a quiet working environment of less than 20 dB.
Long Life Span
Being rated at 30,000 hours these fans are not only long lasting but also maintenance free.
Shock-Absorbing Pads
Shock absorbing shims at all corners protects the fan and reduce vibration noise between the fan and the chassis.






























Reviews
There are no reviews yet