Required mounting parts:
The NH-D9L is a premium grade dual tower CPU cooler that has
been designed to provide excellent quiet cooling performance
at a height of only 110mm. Its comparably low profile (15mm
lower than classic 9cm tower coolers such as the NH-U9S)
doesn’t only guarantee full 3U compliance but also makes the
NH-D9L ideal for compact HTPC and Small Form Factor cases.
Enjoy your NH-D9L!
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.
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 firstname.lastname@example.org.
Noctua cannot be held responsible for any damage or losses
caused by compatibility issues.
Multilingual versions of this manual are available on our
Removing the mainboard
In case you want to use the cooler on an assembled system and
your case doesn’t have a cut-out at the rear side of the mainboard
tray, you first have to remove the mainboard from the case in
order to be able to install the supplied backplate.
2x NM-IMB2 Mounting Bars1x NM-IBP2 Backplate
4x NM-ITS1 Thumbscrews4x NM-IPS1 Spacers
Place the backplate on the rear side of the mainboard so that the
bolts stick through the mounting holes.
Caution: Please make sure that the three cut-outs in the
supplied backplate align with the screws of the mainboard’s stock
Installing the mounting bars
Caution: Choose the alignment of the mounting bars according to
the desired final orientation of the cooler:
First put the plastic spacers onto the bolts of the backplate, then
add the mounting bars.
Attaching the backplate
Caution: The supplied backplate will install over the mainboard’s
stock backplate, so the mainboard’s stock backplate must not be
Orientation A Orientation B
Noctua NH-D9L | Installation Manual | LGA115x
Caution: Make sure that the curved sides of the mounting bars are
Fix the mounting bars using the 4 thumb screws.
Caution: Gently tighten the screws until they stop, but don’t use
Applying thermal paste
If there are residual traces of thermal paste or thermal pads on
your CPU, please clean them off first. Then press a small drop
(4-5mm diameter) of NT-H1 onto the centre of the heatspreader.
Caution: Applying too much thermal paste will lower heat
conductivity and cooling performance!