Noctua NH-U12S DX-3647 User Manual

Dear customer,
Congratulations on choosing the Noctua NH-U12S DX-3647.
Our DX line of coolers has become a default choice in high perfor-
mance quiet cooling solutions for Intel Xeon CPUs and the latest
DX-3647 revision supports LGA3647 (both Square and Narrow ILM)
based Xeon platforms. Each Noctua product is double checked for
flawless operation by our quality control team before it leaves the
factory and I’m confident that you will be able to sense some of
the research, attention and care we’ve put into making this product.
Enjoy your NH-U12S DX-3647!
Yours sincerely,
Roland Mossig, Noctua CEO
This manual will guide you through the installation process of the
SecuFirm2™ mounting system step by step.
Prior to installing the cooler, please consult the compatibility list
on our website (www.noctua.at/compatibility) and verify that the
cooler is fully compatible with your motherboard. Please also make
sure that your PC case offers sufficient clearance for the cooler and
that there are no compatibility issues with any other components
(e.g. tall RAM modules). Double check that the heatsink and fan
clips do not make contact with the VGA card or other PCIe cards.
Noctua cannot be held responsible for any damage or losses caused
by compatibility issues.
Should you encounter any difficulties, please check the FAQs on
our website (www.noctua.at/faqs) and don’t hesitate to contact
our support team at support@noctua.at.
Multilingual versions of this manual are available on our website:
www.noctua.at/manuals
Noctua NH-U12S DX-3647 | Installation Manual | LGA3647
LGA3647
Take the fans off the cooler. Use the included mounting tool and
the short screws to install the appropriate brackets to the cooler.
Required mounting parts:
Determining the socket type (square vs narrow)
and selecting the appropriate brackets
1
Please first check if your motherboard uses square or narrow type
socket(s):
Select the NM-XFB6 brackets for square type sockets and the
NM-XFB7 brackets for narrow type sockets.
This manual shows the installation procedure on square type
sockets, but the procedure is identical on narrow type platforms.
Installing the brackets2
2x NM-XFB6
brackets for square type sockets
2x NM-XFB7
brackets for narrow type sockets
Plastic processor clip square type Plastic processor clip narrow type
4x NM-SSC2 short screws NM-SMT4 mounting tool
75,25 mm
69,00 mm
Caution: Gently tighten the screws until they stop, but don’t use
excessive force (max. torque 0.6 Nm).
The LGA3647 platform uses a plastic clip that fixes the CPU to the
heatsink and ensures that it is properly inserted into the socket.
There are different clips for square and narrow type sockets. Please
first select the clip that matches your socket type.
Putting the CPU into the processor clip and
fixing it to the heatsink
3
NM-XFB6 for square type sockets
NM-XFB7 for narrow type sockets

Noctua NH-U12S DX-3647 Specifications

General

Type	Cooler
Airflow	102.1 m³/h
Bearing type	Self-Stabilising Oil-pressure Bearing (SSO)
Fan diameter	120 mm
Suitable location	Processor
Maximum air pressure	2.34 mmH2O
Rotational speed (max)	2000 RPM
Rotational speed (min)	450 RPM
Noise level (high speed)	22.6 dB
Compatible processor series	Intel® Xeon®
Supported processor sockets	LGA 3647 (Socket P)
Pulse-width modulation (PWM) support	Yes
Material	Cooper
Fan connector	4-pin
Fins material	Aluminum
Product color	Beige, Nickel, Red
Number of fans	2 fan(s)
Number of fan blades	9
Power supply	1.68 W
Rated voltage	12 V
Mean time to failure (MTTF)	150000 h
Heatsink dimensions (W x D x H)	158 x 125 x 45 mm
Cables included	Fan
Master (outer) case width	417 mm
Master (outer) case height	342 mm
Master (outer) case length	481 mm
Master (outer) case weight	15200 g
Harmonized System (HS) code	84733080
Quantity per master (outer) case	8 pc(s)

Weight and Dimensions

Depth	125 mm
Width	158 mm
Height	97 mm
Weight	1018 g
Package depth	198 mm
Package width	227 mm
Package height	160 mm
Package weight	1710 g
Heatsink weight	626 g
Fan dimensions (W x D x H)	120 x 120 x 25 mm

Summary

Determining Socket Type and Selecting Brackets

NM-XFB6 for Square Sockets

Identifies the NM-XFB6 bracket for square type LGA3647 sockets.

NM-XFB7 for Narrow Sockets

Identifies the NM-XFB7 bracket for narrow type LGA3647 sockets.

Installing the Brackets

CPU and Heatsink Attachment

Square Type Processor Clip

Clip for securing the CPU to the heatsink on square sockets.

Narrow Type Processor Clip

Clip for securing the CPU to the heatsink on narrow sockets.

Installing the Heatsink to the Socket

Fastening Outer Screws

Secures the heatsink using outer screws, starting at pin 1.

Tightening Center Screws

Tightens the center screws of the heatsink mounting system.

Installing the Fans

Warranty, Support, and FAQs

Removing Heatsink and CPU

System Transport Recommendations