Is this a 3 pin or 4 pin fan?

It is a 4 pin fan, however; it could be connected to 3 pin but it will run at full speed, according to the manual

Does this fan come with a retension clip to attach to a nh-u9s?

No it does not but the nh-u9s comes with two sets of retention clips, two for each fan.

Is this NF-A9 PWM delivered with a Y-adapter for two fan hookup?

Yes It is complete with a Y csble, an extension cable and a speed reducer. It is packed in a quality box like expensive watches with formed padding.

Is it possible to wire with 2 wires, a hot and a ground?

yes. You need to connect 12V + Ground http://noctua.at/en/products/cpu-cooler-retail.html?faq_view=72

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NF-A9 PWM, Premium Quiet Fan, 4-Pin (92mm, Brown)

Product ID: 253911872

Details

Brand
Noctua
Cooling method
Air
Power connector type
4-Pin
Product dimensions
9.2L x 9.2W x
Voltage
12 Volts

⏳150,000+ hours MTTF

🌀2000 RPM max speed

🔇Ultra-quiet 22.8 dB(A)

$59.59

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Description

🌀 Stay cool, stay ahead—silence never looked this powerful.

BUILT TO LAST - Over 150,000 hours mean this fan keeps your rig cool and reliable for years to come.
COMPACT YET MIGHTY - Sized at 92x92x25mm, fits seamlessly into small form factor builds and HTPCs.
WHISPER QUIET POWER - Experience premium airflow without the noise—perfect for focused work or gaming marathons.
PRECISION PWM CONTROL - 4-pin PWM ensures dynamic speed adjustment for optimal cooling and energy efficiency.
AWARD WINNING ENGINEERING - Flow Acceleration Channels and Acoustic Optimisation frame deliver superior cooling performance.

The Noctua NF-A9 PWM is a premium 92mm computer cooling fan designed for ultra-quiet operation with a max speed of 2000 RPM and noise levels as low as 22.8 dB(A). Featuring advanced aerodynamic design and PWM control, it fits perfectly in compact PC cases and delivers reliable airflow with an exceptional lifespan exceeding 150,000 hours.

Specifications

ASIN	B00RUZ059O
Air Flow Capacity	78.9 Cubic Meters Per Hour
Best Sellers Rank	#40,417 in Computers ( See Top 100 in Computers ) #286 in Computer Case Fans
Brand Name	Noctua
Compatible Devices	Desktop
Cooling Method	Air
Customer Reviews	4.8 4.8 out of 5 stars (4,063)
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	04139052263135, 04716123315513
Included Components	1 package
Item Dimensions L x W x H	9.2L x 9.2W x 2.5H centimeters
Item Weight	0.5 Pounds
Manufacturer	NOCTUA
Material Type	Fibre-glass reinforced PBT
Maximum Rotational Speed	2000 RPM
Model	NF-A9 PWM
Noise Level	22.8 Decibels
Number of Items	1
Number of Packs	1
Part Number	NF-A9 PWM
Power Connector Type	4-Pin
UPC	842431014481 731215275791
Unit Count	1 Count
Voltage	12 Volts

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$59.59

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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