Take the fans off the cooler.Dear customer,Thank you very much for choosing the Noctua NH-U9 DX-4189.Our DX line of coolers has become a default choice in highperformance quiet cooling solutions for Intel Xeon processors,and I’m confident that you will be able to sense some of theresearch, attention and care we’ve put into making this product.Enjoy your NH-U9 DX-4189!Yours sincerely,Roland Mossig, Noctua CEOThis manual will guide you through the installation process of theSecuFirm2™ mounting system step by step.Prior to installing the cooler, please consult the compatibilitycentre on our website (ncc.noctua.at) and verify that the cooleris fully compatible with your motherboard.Please also make sure that your PC case offers sufficient clearance forthe cooler and that there are no compatibility issues with any othercomponents (e.g. tall RAM modules).Double check that the heatsink and fan clips do not make contact withthe VGA card, other PCIe cards, motherboard heatsinks or any othercomponents.Noctua cannot be held responsible for any damage or lossescaused by compatibility issues.Should you encounter any difficulties, please check the FAQs on ourwebsite (www.noctua.at/faqs) and don’t hesitate to contact oursupport team at support@noctua.at.When attaching the CPU carrier frame to the base of the heatsink,turn the heatsink upside down so that the base is facing upwards.Carefully put it down onto the tips of the heatpipes and secureit with your hand so that it cannot tilt and that the fins cannotget bent.Remove the plastic protection cover from the base of the heatsinkand be careful not to damage the layer of pre-applied thermalcompound.Caution: If you are not using the heatsink for the first time andit therefore doesn’t have a fresh layer of pre-applied thermalcompound anymore, you need to apply a thin layer of thermalcompound to the CPU yourself before clipping it to the heatsink.If there are residual traces of previous thermal paste or thermalpads on your CPU or on the heatsink, please clean them off first.NOCTUA NH-U9 DX-4189INSTALLATION MANUALRequired mounting parts:1x NM-XRF6plastic CPU carrier frame forLGA4189-4 (P4)Removing the fans1Assembly of carrier frame, CPU and heatsink &installation to the socket2Caution: The supplied plastic CPU carrier frame is for LGA4189-4(P4) only. LGA4189-5 (P5) systems use the same mountingmechanism system but require a different CPU carrier frame.Please contact us at support@noctua.at if you would like to usethe cooler on a LGA4189-5 (P5) type system.Please follow the official Intel installation manual for how toattach the CPU carrier frame to the heatsink, insert the CPU to thecarrier frame and install the CPU/heatsink assembly to the socket:www.intel.com/processorinstallNote that while the Intel illustrations show a 2U heatsink, theNoctua NM-XFB8 brackets use the same mounting parts, so theprocedure is identical for Noctua heatsinks.Reattach the fans to the heatsink using the supplied steel clips:6 Installing the fans3Connect the fan(s) to the motherboard’s CPU fan header(s). Ifnecessary, use the supplied NA-YC1 y-cable to connect bothfans to one fan header.NOCTUA MOBILE-TAG