Time to change thermal paste but I've lost the align key. Is it proprietary or will any align key work to remove the cooler from mobo

The key is just a ball ended allen key, which you can buy anywhere. That allows you to access the nut at an angle because the cooling fins are in the way.

How often should I change the Thermal Paste?

Every couple of years would be a good pace. Though it depends on the thermal paste quality. I use Arctic MX-4, or Arctic Silver. which allows you to let it there even for three to four years.

How is this cooler packaged from noctua if ordered with an nf-a15 fan? will it all be delivered in a discrete box for security reasons?

Mine was delivered in a normal amazon package with the branded box inside.

Does anyone know if this blocks any of the 8 ram slots on the Asus x399a if i was to use Corsair Vengeance sticks?

I'm using this cooler with Noctua's industrial PWM fans in a push/pull configuration and it doesn’t block anything on the ROG Strix X399-E. I've tested Corsair Vengeance and G.Skill TridentZ sticks and there are no issues with clearance. If needed, you can clip the fan higher up the heatsink to accommodate for taller RAM. For best compatibility, especially with 8 sticks, make sure you’re using Samsung B-die RAM—a lot of Corsair Vengeance sticks aren’t B-die. I switched to B-die TridentZ sticks cos they’re much better and faster for the X399 platform.

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Noctua NH-U14S TR4-SP3, Quiet Server/Workstation High-End Tower CPU Cooler

Noctua NH-U14S TR4-SP3, Quiet Server/Workstation High-End Tower CPU Cooler

Product ID: 48259069

Details

Air flow capacity
140.2 Cubic
Brand
Noctua
Compatible devices
Desktop
Cooling method
Air
Material
Copper (base &
Maximum rotational speed
1500 RPM

🌀140mm NF-A15 fan, 140.2 m³/h airflow

🔥6 copper heatpipes & 6000cm² fin surface

🔧SecuFirm2 custom mounting for AMD sTRX4/TR4/SP3

R4630

Duties & taxes included

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Description

❄️ Keep your powerhouse cool and quiet — because your Threadripper deserves the best!

ELITE COOLING POWER - Maximize your Ryzen Threadripper’s performance with 6 heatpipes and a massive 6000cm² fin array.
WHISPER QUIET OPERATION - Experience near-silent computing with the premium NF-A15 140mm PWM fan running at just 24.6 dB.
AWARD WINNING RELIABILITY - Join thousands of enthusiasts who trust Noctua’s legendary quality backed by 250+ international awards.
OPTIMIZED MULTI GPU CLEARANCE - Offset mounting options provide extra PCIe slot clearance for seamless SLI and CrossFire setups.
TAILORED FIT FOR AM DS BEAST CP US - Custom-designed SecuFirm2 mounting ensures perfect compatibility and effortless installation on sTRX4/TR4/SP3 sockets.

The Noctua NH-U14S TR4-SP3 is a premium-grade air cooler specifically engineered for AMD’s sTRX4/TR4/SP3 platforms, including Ryzen Threadripper and Epyc CPUs. Featuring a large 140mm NF-A15 PWM fan, six copper heatpipes, and a custom SecuFirm2 mounting system, it delivers exceptional cooling performance with ultra-quiet acoustics. Its offset mounting design enhances compatibility with multi-GPU setups, making it the deluxe choice for high-end workstation builds. Backed by over 250 awards and a 6-year warranty, this cooler is the ultimate solution for professionals demanding reliable thermal management.

Specifications

ASIN	B074DX2SX7
Air Flow Capacity	140.2 Cubic Metres Per Hour
Best Sellers Rank	32,177 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 36 in Fans for Laptops
Brand	Noctua
Compatible Devices	Desktop
Compatible devices	Desktop
Cooling Method	Air
Cooling method	Air
Country Of Origin	Taiwan
Customer Reviews	4.7 out of 5 stars 924 Reviews
Global Trade Identification Number	09010018000108
Included Components	Camera body
Item Dimensions L x W x H	15L x 7.8W x 16.5H centimetres
Item Type Name	CPU cooler
Item Weight	1030 Grams
Manufacturer	Noctua
Manufacturer Part Number	NH-U14S TR4-SP3
Material	Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Max Rotational Speed	1500 RPM
Model Number	NH-U14S TR4-SP3
Noise Level	24.6 Decibels
Number of Items	1
Power Connector Type	4-Pin
Power connector type	4-Pin
Product Warranty	6 year manufacturer’s warranty
Product dimensions	15L x 7.8W x 16.5H centimetres
UPC	841501100109
Voltage	12 Volts

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