Required mounting parts:Dear customer,Congratulations on choosing the Noctua NH-D15S. Tailored toprovide superior RAM and PCIe compatibility, the NH-D15S isan asymmetrical single fan version of Noctuaís award-winningflagship model NH-D15. Iím confident that you will be able tosense some of the research, attention and care weíve put intomaking this cooler.Enjoy your NH-D15S!Yours sincerely,Roland Mossig, Noctua CEOThis manual will guide you through the installation process of theSecuFirm2ô mounting system step by step.Prior to installing the cooler, please consult the compatibility liston our website (www.noctua.at/compatibility) and verify thatthe cooler is fully compatible with your motherboard.Should you encounter any difficulties, please check the FAQs onour website (www.noctua.at/faqs) and donít hesitate to contactour support team at support@noctua.at.Noctua cannot be held responsible for any damage or lossescaused by compatibility issues.Multilingual versions of this manual are available on ourwebsite: www.noctua.at/manualsRemoving the mainboardIn case you want to use the cooler on an assembled system andyour case doesnít have a cut-out at the rear side of the mainboardtray, you first have to remove the mainboard from the case inorder to be able to install the supplied backplate.Step 12x NM-IMB2 Mounting Bars1x NM-IBP2 Backplate4x NM-ITS1 Thumbscrews4x NM-IPS1 SpacersPlace the backplate on the rear side of the mainboard so that thebolts stick through the mounting holes.Caution: Please make sure that the three cut-outs in thesupplied backplate align with the screws of the mainboardís stockbackplate.Installing the mounting barsCaution: Choose the alignment of the mounting bars according tothe desired final orientation of the cooler:Step 3First put the plastic spacers onto the bolts of the backplate, thenadd the mounting bars.Attaching the backplateCaution: The supplied backplate will install over the mainboardísstock backplate, so the mainboardís stock backplate must not betaken off.Step 2Orientation A Orientation BNoctua NH-D15S | Installation Manual | LGA115xLGA115xCaution: Make sure that the curved sides of the mounting bars arepointing outwards.Fix the mounting bars using the 4 thumb screws.Caution: Gently tighten the screws until they stop, but donít useexcessive force.Applying thermal pasteIf there are residual traces of thermal paste or thermal pads onyour CPU, please clean them off first. Then press a small drop(4-5mm diameter) of NT-H1 onto the centre of the heatspreader.Step 4Caution: Applying too much thermal paste will lower heatconductivity and cooling performance!