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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NF-A4x10 FLX

Product ID: 50475471

Details

Air flow capacity
8.2 Cubic Per
Brand
Noctua
Compatible devices
Desktop
Cooling method
Air
Material
Fibre-glass
Maximum rotational speed
4500 RPM

⚡12V 3-pin power connector

🌀4500 RPM max speed

🔇17.9 dB(A) ultra-quiet

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Description

🌀 Cool tech, silent vibes — upgrade your airflow game now!

SLIM YET MIGHTY - Compact 40x40x10mm design fits tight spaces like 3D printers and NAS units without compromising performance.
DUAL SPEED FLEXIBILITY - Choose between 4500 or 3700 RPM with included Low-Noise Adaptors for tailored cooling and silence.
PLUG PLAY VERSATILITY - Comes with extension cables and OmniJoin adaptors for seamless integration with proprietary fan headers.
VIBRATION FREE OPERATION - Anti-vibration mounts ensure stable, noise-free performance, elevating your workspace tranquility.
WHISPER QUIET POWERHOUSE - Experience high airflow at a barely-there 17.9 dB noise level—your devices stay cool without the distraction.

The Noctua NF-A4x10 FLX is a premium 40x40x10mm slim fan engineered for ultra-quiet, high-performance cooling. Operating at 12V with a 3-pin connector, it offers dual-speed settings (4500/3700 RPM) and advanced aerodynamic features to maximize airflow while minimizing noise at just 17.9 dB(A). Ideal for compact electronics like 3D printers, NAS, and routers, it includes anti-vibration mounts and versatile adapters for easy installation, backed by a 6-year warranty.

Specifications

ASIN	B009NQLT0M
Air Flow Capacity	8.2 Cubic Metres Per Hour
Best Sellers Rank	4,121 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 30 in Thermal Management Products
Brand	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Customer Reviews	4.8 4.8 out of 5 stars (11,305)
Global Trade Identification Number	04716123314691, 07123290462549, 07133363436841
Included Components	Please see product Description for what is included
Item Dimensions L x W x H	40L x 40W x 10H millimetres
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
Manufacturer Part Number	NF-A4x10
Material	Fibre-glass reinforced PBT
Max Rotational Speed	4500 RPM
Model Number	NF-A4x10
Noise Level	17.9 Decibels
Number of Items	1
Number of Packs	1
Power Connector Type	3-Pin
Product Warranty	6 year manufacturer’s warranty
UPC	163121136772 809185325669 806291857176 804066543873 842431014054 102930672934 782386476753 172302657890 132017920719 808111662861 809385174852 168141421648 851905102548
Unit Count	1.0 count
Voltage	12 Volts

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340.16 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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3 days ago

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Smooth transaction and product arrived in perfect condition.

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