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NF-S12A ULN 12V 800RPM 120mm Ultra Low Noise Cooling Fan €19,54
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(67 customer ratings)
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Noctua NF-S12A ULN 12V 800RPM 120mm Ultra Low Noise Cooling Fan

The NF-S12A marks the third generation of Noctua’s signature S12 series quiet case fans, which have received more than 250 awards and recommendations from the international press.

Features

  1. Noise levels from only 6.7 dB(A)
  2. High 43.73 CFM airflow
  3. Advanced Acoustic Optimisation Frame
  4. Two speed settings for maximum quietness
  5. Smooth SSO-Bearings
  6. Six year warranty

Featuring a further refined blade design with Anti-Stall Knobs that works in tandem with the new AAO or Advanced Acoustic Optimisation frame. The NF-S12A improves the airflow/noise efficiency of its renowned predecessor by up to 8%. The ULN version provides super-slow 800 / 600rpm speed settings for ultra-low-noise applications and highly noise sensitive users who demand near-silent operation. Its superb running smoothness, SSO2-Bearings and Noctua’s trusted premium quality make it an elite choice for quiet case cooling.

Noctua’s Advanced Acoustic Optimisation Frame

Noctua’s AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua’s proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan’s performance/noise efficiency.

Advanced Acoustic Optimisation Frame
Advanced Acoustic Optimisation Frame

Anti-stall Knobs: What is Stall?

Noctua’s S12 series fans impellers use a high angle of attack in order to achieve superior airflow. However, impellers with high angles of attack are typically more prone to undesired stall and flow separation phenomena that can occur when the fan is working against higher impedance such as when blowing through tight fan filters or when used on heatsinks and radiators.

What is Stall?
What is Stall?

In these situations when the fan is building up high pressure but less air is moving through, the speed of the air particles flowing alongside the suction side of the fan blades gradually decreases towards the trailing edge. The lower the speed and the higher the counter-pressure, the higher the risk of the air particles becoming detached from the blade surface. This flow separation phenomenon known as stall leads to undesired turbulence, reduced efficiency and translates into a dent in the fan’s performance curve.

Integrated Anti-Vibration Pads

Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems.

Smooth Commutation Drive 2

The latest version of Noctua’s advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the NF-S12A remarkably quiet even at very close distance.

Stepped Inlet Design

Noctua’s Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space restricted environments.

Inner Surface Microstructures

With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency.

Package Contents

As expected from Noctua, the fan is well packaged and is supplied with both the usual fan mounting screws and also rubber fan mounts to isolate the fan from the case ensuring that no vibrations from the fan can reach the case. An in-line resistors (L.N.A) is included and this simply lowers the voltage and therefore the speed of the fan from 800 to 600 rpm if full speed isn’t required. A Molex adapter allowing you to power the fan from the PSU and an extension cable are also included.

Additional Images


SpecificationsNF-S12A ULN
Size120 x 120 x 25 mm
BearingSSO-Bearing
Connector3-Pin
Blade GeometryS-Series with Anti-Stall Knobs
Rotational Speed ±10%800 PRM
Rotational Speed with L.N.A. ±10%600 RPM
Airflow43.7 CFM
Airflow with L.N.A.33.8 CFM
Acoustical Noise8.6 dB(A)
Acoustical Noise with L.N.A.6.7 dB(A)
Static Pressure0.62 mm H2O
Static Pressure with L.N.A.0.44 mm H2O
Input Power0.72 W
Input Current0.6 A
Voltage Range12 V
MTBF> 150.000 h
Warranty72 months
EAN barcode4716123314912
SpecificationsNF-S12A ULN
Size120 x 120 x 25 mm
BearingSSO-Bearing
Connector3-Pin
Blade GeometryS-Series with Anti-Stall Knobs
Rotational Speed ±10%800 PRM
Rotational Speed with L.N.A. ±10%600 RPM
Airflow43.7 CFM
Airflow with L.N.A.33.8 CFM
Acoustical Noise8.6 dB(A)
Acoustical Noise with L.N.A.6.7 dB(A)
Static Pressure0.62 mm H2O
Static Pressure with L.N.A.0.44 mm H2O
Input Power0.72 W
Input Current0.6 A
Voltage Range12 V
MTBF> 150.000 h
Warranty72 months
EAN barcode4716123314912

FAQ

  • How do I measure fan size?

    The size of fan you need will generally be determined by the size of the fan fitting position in your PC case. The sizes of all the fans on our website are shown as measured along any one of the fan’s four sides, NOT the distance between the fan’s screw holes! Our most popular fan size is 120mm, followed by 80mm. This isn’t really dictated by customer preference, but more by recent designs of PC cases.

    As for the thickness (depth) of the fan, generally 25mm (1 inch) is by far the most common depth, although smaller fans can have shallower depths such as 15mm or even 10mm. All our fans are 25mm thick unless otherwise stated. If you have any questions about which fan you should order, please don’t hesitate to get in touch.

    If you know the distance between the fan mounting screw holes but don’t know what fan size to order, please see the following table. Note that the mounting hole measurements shown below are taken horizontally or vertically between the holes and not diagonally.

    Screw hole spacings and fan sizes

    32mm between screw holes:40mm fan size
    40mm between screw holes:50mm fan size
    50mm between screw holes:60mm fan size
    60mm between screw holes:70mm fan size
    72mm between screw holes:80mm fan size
    83mm between screw holes:92mm fan size
    105mm between screw holes:120mm fan size


  • I received a small cable (resistor) with my fan; what is it for?

    The resistor cable (also called Ultra Low Noise or ULN cable) is designed to allow the fan to run slightly slower for even quieter operation. The benefit in lower running noise is significant. Although the airflow will be reduced slightly, this usually has minimal effect on PC temperature. We would generally recommend using the ULN resistor cable for best results in almost all circumstances.

  • How can I tell which way the air blows through the fan?

    Hold the fan so that the round fan sticker is facing you. You are looking at the rear of the fan. When you plug the fan in, the air will be blowing towards you. If you want a fan to act as an air intake, then the fan sticker will be facing the inside of the case. Some fans also have two small arrows moulded into their plastic housing - one arrow shows the direction of airflow, and the other (at 90°) shows the direction of blade rotation.

  • Is it possible to use a 4-pin PWM fan or CPU cooler with a motherboard which has only 3-pin fan headers on it?

    Electrically, there is no problem doing this - the fourth pin on the fan cable is used purely for PWM control and is not needed in order for the fan to run. So you can plug the 4-pin fan connector onto the 3-pin motherboard fan header, leaving the fourth pin not connected to anything. The fan will potentially run at full speed, so if you would like to reduce the speed of the fan you will need to adjust the fan speed setting in your BIOS or use fan control software such as SpeedFan in Windows.

    The only other problem to consider is that occasionally, components immediately adjacent to the motherboard fan header can get in the way of the larger 4-pin fan connector, physically preventing connection. This problem also occurs if you try to use an in-line fan speed controller such as the one made by Gelid.

    Another avenue to explore is the possibility of using a bay-mounted fan controller. Several models are available now which provide 4-pin fan headers, so this is an easy way to use 4-pin PWM fans in a PC system which has only 3-pin fan headers on its motherboards. When using this method, you may find it necessary to disable any fan warning settings in your motherboard BIOS, since the motherboard may incorrectly believe that its CPU fan has failed when the fan is connected to a fan controller rather than directly to the motherboard itself.

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“Can’t recommend highly enough!”

“When I required a replacement for my PC, I stumbled across Quiet PC who were mentioned in an article in an online magazine. I found their website rather pleasant. It offers a good selection of components with obvious focus on low noise levels, but without sacrificing performance, and doesn’t overload the potential buyer with tons of options that are likely irrelevant. In other words, they focus on the components they know well. And that shows when you receive the PC (more in a moment).

For my build, I had a few customisation requests and questions: I needed extra cables prepared for disks and a graphics card I wanted to fit in, because I didn’t want to deal with cable management myself (If I had known how spacious the case is, I could have done it myself, though). Those requests were accommodated at no extra cost.

Any questions I had were answered within a few hours, and during follow-up email conversation it rarely took more than an hour to receive a helpful response. Absolutely no copy&paste style emails from Quiet PC! Service and communication has been excellent throughout the ordering process (and beyond).

When the PC arrived, I was positively suprised about the packaging as well as all the extra bits and pieces they ship with the computer: All manuals from individual components, all spare cables, lots and lots of screws for different purposes (put into nicely labelled bags), and even the remaining screws and brackets for the CPU cooler - including the CPU dust cover and extra thermal paste. In other words, you get all the original parts which weren’t needed in the build, and then some!

Before I first switched the PC on, I opened it to add all my disks and the graphics card. All the cables were prepared as I asked them to do. The cable management throughout was very neat and tidy. I have used other custom PC builders in the UK before, but none of them were even close to Quiet PC when it comes to cable management.

So, do Quiet PC build quiet PCs? Absolutely, yes, and without any sacrifice on performance or temperature levels. The case fans and Noctua CPU cooler keep the i7-6700K and the system temperature in the low 30C range during idle and normal office work.

I ended up replacing the case fans with Noctua fans, merely because I’m obsessed with noise levels and they are a bit quieter under load and can respond to raising temperature levels, but that doesn’t take anything away from Quiet PC’s choice -- The computer was already very quiet before, and the manual fan speed slider will be more than sufficient for the majority of users. (In fact you will hardly have to touch it; the idle airflow is good enough and you have to push the PC very hard to get temperatures beyond 55C for the CPU and low 40s for the system)

I apologise for getting carried away with this review! :-)

The bottom line is: brilliant service, including the option to have custom changes done; excellent build quality, packaging and spare parts; quick delivery (4 days in my case, instead of up to 7 as advertised). You can’t go wrong with these guys!”

(Review via Trustpilot)