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Thank  you  very  much  for  choosing  a  Noctua 
cooler.  This  manual  will  guide  you  through  the  
installation process step by step.

Noctua LGA775 Mounting-Kit 

Installation Manual

NH-U12P-LGA775 

Installation Manual

Required mounting parts (from the LGA775-bag):

the  backplate’s  screw  sockets  with  the  mainboard’s  screw-
holes.

Step 3:

Attaching the fastening brackets to the heatsink

Now screw the mounting bars to the backplate using small 
screws and washers. 

Tightly screw the fastening brackets to the base of the heatsink 
using 4 short screws.

Step 4:

Applying thermal paste

If there are residual traces of thermal paste or thermal pads on 
your CPU, please clean them off first. 

 

Removing the mainboard

Step 1:

In case you want to use the NH-U12P on an assembled system, 
you first have to remove the mainboard from the case as the 
cooler has to be screwed together with the backplate on the 
back side of the mainboard.

1x LGA backplate

Prior to installing the cooler, please consult the compat-
ibility list on our website and verify that the cooler is fully 
compatible with your motherboard. 

Should  you  encounter  any  difficulties,  please  check  the 
FAQs  on  our  website  and  don’t  hesitate  to  contact  our  
support  team  at  [email protected].  Noctua  cannot 
be held responsible for any damage or losses caused by  
compatibility issues.

Multilingual versions of this manual are available on our 
website: www.noctua.at 

2x short silver

springscrews

2x short mounting bars

Required mounting parts (from the common parts bag):

2x standard fastening brackets

2x red, thin washers

2x pressure springs

8x short screws

Press a small drop (4-5mm diameter) of NT-H1 onto the cen-
tre of the heat-spreader.

Put the heatsink onto the CPU and turn it back and forth a few 
times in order to spread the paste.

Caution:

 Peel off the protection film at the bottom side of the 

heatsink first!

Caution:

 Applying too much thermal paste will lower the heat 

conductivity and cooling performance!

Caution:

 The rubber foam square of the LGA backplate 

has to face the mainboard. 

Don’t

 remove the white protec-

tion film! 

Caution:

  Don’t  forget  to 

put 4 washers between the 
mainboard and the mount-
ing bars to avoid damage to 
the mainboard.

Step 2:

Attaching the backplate

Place the backplate on the back side of the mainboard, aligning

Orientation A

Orientation B

Choose the alignment of the mounting bars according to the 
desired final orientation of the cooler:

Caution:

 Make sure that the straight sides of the mounting 

bars face the socket and the bulgings are pointing outwards.

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