Noctua NH-U12S DX-3647 Installation 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
Required mounting parts:
2x NM-XFB6 2x NM-XFB7
brackets for square type sockets brackets for narrow type sockets
Plastic processor clip square type Plastic processor clip narrow type
4x NM-SSC2 short screws NM-SMT4 mounting tool
Noctua NH-U12S DX-3647 | Installation Manual | LGA3647
1 Determining the socket type (square vs narrow)
and selecting the appropriate brackets
Please first check if your motherboard uses square or narrow type
socket(s):
NM-XFB6 for square type sockets
NM-XFB7 for narrow type sockets
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.
2

Installing the brackets

Take the fans off the cooler. Use the included mounting tool and
the short screws to install the appropriate brackets to the cooler.
Caution: Gently tighten the screws until they stop, but don't use
excessive force (max. torque 0.6 Nm).
3 Putting the CPU into the processor clip and
fixing it to the heatsink
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.