Noctua NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler
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s
08-06-2025it comes with everything including fan clips. man. thanks noctua. This is how they all should come though.
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Ian T.
> 3 dayThis kit is suppose to be a secondary fan to the NH-U12S Redux Cooler. First, let me say that this is my second Noctua purchase. Their fans and accessories are top notch. They are the ROLEX of the PC Fan industry and dont skimp on quality of their products. The fan upgrade however is not what I expected, the fan blades are entirely different than the one that comes on the Redux cooler. Although, the same size, different blades and the rubber grey sound dampeners are even twice as thick as the fan that comes with the Redux. Not sure if this was a mistake or if Noctua intentionally allowed this variance in product types, but the sound dampener on the upgrade fan makes it very difficult to install and the noise from the second fan is more pronounced which I can tell between the original and upgrade fan.
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RS
> 3 dayWorks as expected.
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Mia G.
> 3 dayI have the single fan cooler and it does a wonderful job of cooling vs the stock cooler. I am about 15 (C) degrees cooler with the Noctua. I went ahead and added this second fan and it gave me about 5 (C) degrees more for a total of 20 (C) vs the stock cooler (AMD).
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paul_cheng
> 3 dayAdded this as a second fan to the NH-U12S Redux Cooler for an Intel i7-12700K CPU. Setup was straight forward as with other Noctua coolers/fans. This helped to drop the CPU temp about 2 degrees on average at idle/load. Good upgrade at such low price point.
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Ben
> 3 dayThe Hype is real! Noctua products bring exceptional quality with low noise and dependable cooling! However, the size of the 120 mm fan is bigger than you may think. I’d recommend measuring clearances before buying them.
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Dougie
> 3 dayI bought this to slap on the front of my NH-D15 so I could move the other two fans back a slot and have three fans, because Im stupid, and was curious to see if there would be much of a difference in temps. Well, there was. About 9c, so Im going to leave it on there.
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Todd D.
Greater than one weekI have an Intel I7-12700k that is overclocked and adding the second fan keeps the temps more than under control. The Noctua CPU fan is quiet and efficient. This is so much better than having an AIO stuffed in the case.
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Ross Havens
> 3 dayEasy to install- lowered temperature by more than 5 degrees.
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Patrick
> 3 dayDoesnt cost much more for the second fan upgrade and makes a nice difference!
The NA-FK1 is a second fan kit for the NH-U12S redux CPU cooler. Upgrading it to a push/pull-style dual-fan setup makes it possible to further improve cooling performance or to reduce noise levels by having two fans running at lower speeds. The kit includes a second NF-P12 redux-1700 PWM fan, anti-vibration pads, fan mounting clips, a 4-pin PWM y-cable as well as two Low-Noise Adaptors – everything you need to boost the efficiency of your NH-U12S redux!
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Enhanced cooling performanceAdding a second NF-P12 redux-1700 PWM fan to the NH-U12S redux makes it possible to further improve cooling performance by around 1-3°C, depending on the application. As a rule of thumb, the gains are bigger the higher the heat load, so the NA-FK1 is particularly attractive for higher-end CPUs, extensive turbo use or overclocking. |
NF-P12 redux-1700 PWMThe NF-P12 redux-1700 PWM fan included with the NA-FK1 is the same high-quality unit that comes pre-installed on the NH-U12S redux CPU cooler, so it’s a perfect match for a push/pull-style dual-fan setup. Supporting PWM for automatic speed control, it can run near silent most of the time and provide massive performance when necessary. |
Lower noise levels and acoustic fine-tuningThe NA-FK1 can not only be used to enhance cooling performance, but also to lower noise levels: by letting both fans run at reduced speeds, either via automatic PWM control using the supplied y-cable or via the included Low-Noise Adaptors, the NH-U12S redux can operate more quietly while maintaining the same level of performance. |
Specifications
Scope of delivery
- NF-P12 redux-1700 PWM fan
- 4x NA-AVP2 grey anti-vibration pads
- Fan mounting clips (one pair)
- NA-YC1 4-pin PWM y-cable
- 2x NA-RC14 Low-Noise Adaptor (L.N.A)
Connector & pin-configuration
4-pin PWM
Renowned Noctua quality
Noctua products are renowned for their impeccable quality and outstanding longevity. True to this legacy, the NF-P12 redux unit that comes with the NA-FK1 set features an MTTF rating of more than 150,000 hours.