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Noctua NH-U12P SE2 FAQs
Is the high weight dangerous for the CPU or socket?
No. Noctua NH-U coolers possess an extremely reliable SecuFirm™ mounting system. Even transporting the pc with the cooler installed is entirely safe. Thanks to the screw connection with the backplate on the rear side of the motherboard, the exceedance of the weight recommendations by Intel and AMD common among high-end coolers is completely unobjectionable.
Is it possible to mount fans with a greater height than 25mm?
Yes. The fan mounting clips grip to the screw holes in the lower edge of the fan frame and hence work with all fans regardless of their height. However, problems with the mounting of the fan can occur due to other parts within the case or fans with special frame designs, where the clips can't grip to the screw holes in the lower edge of the frame.
Is it possible to run two fans at a time?
Yes. Using the 4 supplied fan clips, you can mount two 120mm fans on the NH-U12(F/P) and two 92mm fans on the NH-U9(F/B).
Should the fan be mounted sucking away from the heat-sink or blowing onto the heat-sink?
Please install the fan blowing onto the heat-sink.
If you're using two fans, please install them so that one blows onto the heat-sink and the other sucks the air away from the other side.
On which side of the heat-sink should the fan be installed?
Please install the fan so that the hot air can be disposed as good as possible either through the rear case fan (Airflow Option 1) or through the power supply (Airflow Option 2).
Is it possible to cool my CPU without a fan (passive) using the NH-U coolers?
The NH-U coolers weren't originally designed for passive operation although the cooling performance is sufficient in many cases. Unfortunately, it is impossible for us to indicate whether a certain CPU can or cannot be cooled without a fan, as this depends on various factors such as case temperature, case ventilation or the orientation of the socket. Generally, we recommend using a fan in the first instance and then lowering RPM while constantly monitoring the temperature.
Why doesn't the bottom of the NH-U coolers have a polished, mirror like finish?
Bearing in mind that the majority of today's PC enthusiasts uses high-viscosity thermal compounds, the bottom-surface of the NH-U coolers is optimised for the use with this type of thermal pastes. The micro-grooves on the surface of the NH-U coolers' base ensure that high-viscosity thermal compounds are dispersed to a uniform thin layer across the whole contact area and that no air pockets remain between the cooler and the CPU. With a polished, mirror like surface, the risk of uneven dispersion is much higher. As too thick layers of thermal paste and air pockets drastically deteriorate heat transmission, the micro-grooves are is of vital importance to the overall cooling performance of the NH-U coolers when used with today's high-viscosity thermal pastes.
How to install the fan using the supplied steel clips?
First hook the clip into the notch of the heatsink:
Then hook the endings of the clips into the mounting holes of the fan:
How much clearance for RAM or chipset coolers does the NH-U12P provide?
The NH-U12P provides 40mm clearance for near-socket components:
What can I do if the fan blocks my RAM or chipset cooler?
In order to increase clearance, you can easily move the fan up a few fins as show below:
I've got 2 adapter cables with the cooler. What's the difference between these cables?
The Low-Noise-Adapter (L.N.A.) and Ultra-Low-Noise-Adapter (U.L.N.A.) reduce the speed of the fan to 1100 / 900 rpm:
Can I use Noctua fans on my fan controller?
In general, our fans can be used with any fan controller. There is a known compatibility issue with the Zalman ZM-MFC2 controller though: This product uses Pulse Width Modulation (PWM) in order to control the fan speed and the unfavourable carrier frequency of the PWM signal can create an oscillation when used with certain fans. This will result in the fan speeding up and down. We therefore recommend not using the Zalman ZM-MFC2 with our fans.
My fan doesn’t spin when I start up the PC - is it faulty?
If you've connected the fan directly (or using the supplied Low-Noise or Ultra-Low-Noise-Adaptors) to your mainboard, it's possible that the mainboard's automatic fan controller doesn't provide the required starting voltage due to the low CPU temperature. Please verify whether the fan starts spinning at higher CPU temperatures, remove any Low-Noise or Ultra-Low-Noise Adaptors, deactivate your mainboard's automatic fan controller in the BIOS or connect the fan directly to the power supply using the supplied 3:4-pin adaptor.
Can I run Noctua fans on 4-pin PWM connectors and use my mainboard’s automatic fan controller?
You can simply connect our fan's 3-pin connector to the 4-pin PWM sockets of today's mainboards so that the fourth pin that transmits the PWM signal is left blank (due to the shape of the connector, there's no danger of reversing polarity). Most current mainboards are capable of controlling fans not only via PWM, but also by adjusting the supplied voltage. In some cases, this may require you to change BIOS options like "Fan Control Mode" from "PWM" to "Voltage" or "Analog". Please consult your mainboard's manual in this regard. However, most current mainboards use an "auto" setting by default that automatically chooses PWM or voltage based regulation according to the connected fan. Automatically controlling the fan speed may not possible on mainboards that pulse the power rather than lowering the fan voltage.
 
How can I check whether my case is wide/high enough for the cooler?
In order to check whether the cooler isn’t too high for your case, please measure the distance from the motherboard tray to the side panel (tower cases) or top panel (desktop cases). If this distance is bigger than the height of the cooler + 15mm (mainboard spacers + mainboard + CPU), the height/width of your case should be sufficient.
Help, the base of the cooler doesn’t make contact with the CPU / there is no contact pressure!
Please verify that you have installed the fastening brackets correctly:
Does the cooler offer sufficient clearance for my RAM modules?
The cooler offers sufficient clearance for modules of up to 40mm in height. RAM modules with higher heatspreaders can cause compatibility issues on mainboards where the heatsink extends over the RAM slots (Note that you can move the fan up as shown here in case only the fan hangs over the RAM slots).
Is the cooler compatible with LGA1366 mainboards for Xeon 5500?
Due to the custom NM-I3 backplate, the cooler can not be used on mainboards that have a backplate with screw threads for CPU cooler installation (such as the Intel reference backplate for Xeon 5500). Please choose our NH-U12DX 1366 for these mainboards.
My mainboard has more than one set of mounting holes. Which one should I use?
Please always use the standard set of mounting holes that's compliant with your socket type (e.g. 75mm LGA1156 hole spacing on LGA1156 sockets) and parallel to the sides of the socket. Don't use mounting holes which are rotated in relation to the socket.
I can't open the socket due to the mounting bars!
Please first loosen one of the two thumbscrews that hold the mounting bars in place. Then untighten the second screw so that you can swivel the mounting bar and open the socket. Depending on the position of the mounting bars, you may need to swivel both.
Can the cooler be installed turned by 90° on AMD sockets?
No. The new SecuFirm2™ mounting system for AM2, AM2+ and AM3 uses the same standardised hole spacing as the Intel system and thus allows for a much easier installation, but the cooler cannot be installed turned by 90°.
Does the package include a backplate for AMD AM2/AM2+/AM3?
No. As most AMD mainboards come with a stock backplate preinstalled, the cooler doesn’t include an AMD backplate. If your mainboard doesn’t have a backplate, please contact our support team at support@noctua.at.
Can I use Corair Dominator RAM with the cooler?
The cooler can extend over the RAM slots on some mainboards. While DDR2 Corsair Dominator don't fit underneath the cooler, DDR3 Corsair Dominator do fit when the removable top heatsink is taken off as shown below. Please also note that the NF-P12 fan can be moved upwards or taken off in order to improve RAM compatibility as shown here.
The y-split cable that came with the cooler is missing a wire!
While the black and red power cables lead to both fan connectors, the yellow cable transmitting the speed signal only leads to one of the two fan connectors. This is necessary because mainboards are unable to process more than one speed signal on a single fan header.
The fan doesn’t start with the Ultra-Low-Noise Adaptor (ULNA)!
Unfortunately, many Gigabyte mainboards use a special control circuit that can lead to start-up problems in conjunction with the Ultra-Low-Noise Adaptor (ULNA). This control circuit remains active even when automatic fan control is disabled in the BIOS. In these cases, please use the fan without the ULNA or connect it directly to the power supply (or an external fan controller) in order to ensure reliable operation with the ULNA.
I get a CPU fan error despite the fan is running!
Some mainboards display a CPU fan error when the fan speed falls below a certain threshold, e.g. 900rpm. If you want to run the fan below this speed (e.g. using the supplied U.L.N.A.), please adjust the threshold in the BIOS or disable CPU fan error warning.
Do you have a question concerning one of our products? Please use this form to pose a question!
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01.09.2010 - Oyunüzerine.com NF-P14 FLX
Test verdict: "Eski sitemizdede ürünlerini incelediğimiz Noctua firmasının bu yeni ürünü ile tekrar sizlere merhaba demek güzeldi. Ürün tasarımı, kutu içeriği, montaj kolaylığı, 120 mm’lik yuvalara takılabilmesi, sessizliği ve hava akımındaki kalitesi ile ürün kullanıcıların tüm isteklerini karşılayabilecek düzeyde." (Uğur Özdemir, Oyunüzerine.com)
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27.08.2010 - Futurelooks.com NH-D14
Test verdict: "The Noctua NH-D14 is indeed the best performing CPU cooler money can buy." (Eric Garay, Futurelooks.com)
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27.08.2010 - lesiloc.fr NH-U12P SE2
Test verdict: "Noctua avec son NH-U12P SE2 a réussit à passer au travers des années et su adapter un produit dont la conception de départ était hors de commun." (Hervé Goeres, lesiloc.fr)
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