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.

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.

What is the sound decible rating

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

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

Product ID: 260040000

Details

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

⚡4500/3700 RPM dual-speed

🌀60.1 m³/h airflow

🔇17.9 dB(A) ultra-quiet

€ 58.02

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Description

🛠️ Upgrade your gear with the quietest fan that means business.

COMPACT POWERHOUSE - Slim 40x40x10mm design fits tight spaces like 3D printers, NAS, and routers without compromising airflow.
WHISPER QUIET COOLING - Experience near-silent operation with industry-leading 17.9 dB(A) noise levels—your workspace’s new zen zone.
PLUG PLAY VERSATILITY - 3-pin 12V connector with extension and OmniJoin adaptors ensures seamless integration with proprietary headers and custom setups.
VIBRATION FREE OPERATION - Includes anti-vibration mounts and premium build materials to eliminate distracting fan buzz and prolong device life.
PRECISION AIRFLOW CONTROL - Dual-speed 4500/3700 RPM settings let you fine-tune cooling performance for maximum airflow or whisper-quiet efficiency.

The Noctua NF-A4x10 FLX is a premium 40x40x10mm 12V 3-pin fan engineered for ultra-quiet, high-performance cooling. Featuring dual-speed operation (4500/3700 RPM), advanced acoustic optimization, and anti-vibration mounts, it delivers 60.1 m³/h airflow at just 17.9 dB(A). Ideal for 3D printers, NAS, routers, and compact electronics, it’s the go-to upgrade for professionals seeking silent, reliable cooling.

Specifications

ASIN	B009NQLT0M
Air Flow Capacity	60.1 Cubic Meters Per Hour
Best Sellers Rank	#25,508 in Computers ( See Top 100 in Computers ) #165 in Computer Case Fans
Brand	Noctua
Brand Name	Noctua
Compatible Devices	Desktop
Compatible devices	Desktop
Cooling Method	Fan
Cooling method	Fan
Customer Reviews	4.8 out of 5 stars 11,182 Reviews
Global Trade Identification Number	04716123314691, 07123290462549, 07133363436841
Included Components	1 package
Item Dimensions L x W x H	40L x 40W x 10H millimeters
Item Highlight	High Airflow Low Noise 10mm Slim Design, for PC and Electronics Cooling, 2 Speed Settings 4500/3700rpm 3-Pin
Item Weight	50 Grams
Manufacturer	Noctua
Material Type	Fibre-glass reinforced PBT
Maximum Rotational Speed	4500 RPM
Model	NF-A4x10
Noise Level	17.9 Decibels
Number of Items	1
Number of Packs	1
Part Number	NF-A4x10
Power Connector Type	3-Pin
Power connector type	3-Pin
Product dimensions	40L x 40W x 10H millimeters
UPC	163121136772 809185325669 806291857176 804066543873 842431014054 102930672934 782386476753 172302657890 132017920719 808111662861 809385174852 168141421648 851905102548
Unit Count	1 Count
Voltage	12 Volts

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€ 58.02

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

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TrustScore 4.5 | 7,300+ reviews

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