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

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

Q: This might be a dumb question, but what is the operating voltage? Don't see a rating anywhere in the description or reviews and hoping it's 12VDC.

12 volts DC. 3 pin connector but comes with a 2 pin adapter and extension cables.

Q: Have anyone used this to replace the 35 mm assist fans on an asus sabertooth z87?

I have it in my Asus Sabertooth Z170 S and it fits just fine! (just remove the two Anti-Vibration Pads in contact with the TUF Armor to be able to close the lid). Take into consideration that in my version of the Sabertooth, the assistant fan position is vertical, inside the TUF Thermal Armor, between the IO Shield and the heatsink VRM, and works as an intake fan, to blow fresh air into the motherboard. Every Sabertooth Assistant Fans are designed to work differently. I believe in your motherboard the fan is place horizontally, on Top of the TUF Thermal Armor. Also the fans needed for your Sabertooth Z87 had a mini 3 pin connector, my motherboard use 3 or 4 pin (regular size) connectors. Therefore the original assistant fan of the Sabertooth Z87 cannot be plugged in the Assist Fan 1 connector of my Sabertooth Z170 S. I know this because I was looking for the fans for my motherboard and buy the Z87 version by mistake, couldn't use it, so I buy the 40mm Noctua, and it works great! Really improved the temperature inside my case. Also my motherboard use 40mm fans. I'm not sure of the Z87 assistant fans size, but putting the two of them together, are exactly the same size, only thing adding up to the size variation, are the Noctuas silicone anti vibrations pads, that can be removed. Hope this helps even a little bit.

Q: What is the sound decible rating

http://noctua.at/en/products/fan/nf-a4x10-flx/specification 17.9

Product ID: 260040000

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Details

Product dimensions
40L x 40W x
Brand
Noctua
Power connector type
3-Pin
Voltage
12 Volts
Cooling method
Air

⏳>150,000 hours MTTF for unmatched durability

🌀4500/3700 RPM dual-speed control

🔇max. 17.9 dB(A) ultra-quiet operation

Frequently Bought Together

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

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Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)

Description

🌀 Elevate your airflow game—quiet, compact, and built to last.

WHISPER QUIET COOLING - Experience near-silent airflow with advanced acoustic optimization—perfect for focused work or restful nights.
DUAL SPEED FLEXIBILITY - Easily switch between 4500 RPM for max airflow or 3700 RPM for whisper-quiet performance using included Low-Noise Adaptors.
VIBRATION FREE OPERATION - Anti-vibration mounts and premium build quality ensure smooth, stable performance that won’t disrupt your workspace.
COMPLETE INSTALLATION KIT - Includes fan screws, extension cable, and OmniJoin adaptor set for effortless, professional-grade setup.
PRECISION FIT FOR COMPACT SPACES - Slim 40x40x10 mm design fits seamlessly into 3D printers, NAS devices, routers, and more—upgrade your gear without compromise.

The Noctua NF-A4x10 FLX is a premium 40x40x10 mm 12V 3-pin fan engineered for ultra-quiet, high-performance cooling. Featuring dual-speed operation (4500/3700 RPM), advanced acoustic optimization, and over 150,000 hours mean time to failure, it’s the ideal upgrade for 3D printers, NAS, routers, and other compact devices requiring reliable, silent ventilation.

Specifications

Brand	Noctua
Product Dimensions	4 x 4 x 1 cm; 50 g
Item model number	NF-A4x10
Manufacturer	Noctua
Series	NF-A4x10 FLX
Color	Brown
Voltage	12 Volts
Are Batteries Included	No
Item Weight	50 g

Have a Question? See What Others Asked

what is the CFM for this fan?

This might be a dumb question, but what is the operating voltage? Don't see a rating anywhere in the description or reviews and hoping it's 12VDC.

Have anyone used this to replace the 35 mm assist fans on an asus sabertooth z87?

What is the sound decible rating

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