Noctua NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler
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Chan
> 3 dayI bought this fan adding additional to my CPU cooler fans. Now I have 3 fans total on my cooler fans and my temperature (max when gaming dropped from 70 to 60 ) dropped 10 degrees. I would buy again when needed.
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Ben
09-06-2025The 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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matthew
Greater than one weekI am using the Noctua NH-U12S Redux on a Ryzen 5 5600 overclocked to 4.65ghz. Running Cinebench R23 at full load I was topping off at 81-82c before adding this second fan and now under full load running the same test, I max out at 76-77c. Thats a 5-degree drop for only $18.18 with tax.
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Gabriel Q.
> 3 dayOverall great product but keep in mind that it does not come with screws, unless you have mounting screws of your own this is not a problem. U feel like a set of screws should’ve been added to give the buyer a more flexible spectrum of where they could place this fan. Fan itself is a 5 star, kit would be like a 4 1/2 would definitely buy again if needed.
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felipe montoya
> 3 dayNoctua seal of quality
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Joe B
> 3 dayUsed to add 2nd fan to an NH-D15 where the included 2nd 140mm wouldnt fit due to case width issues. This 120mm fit fine. Using the supplied 2 fan splitter I now have about a 4-5c lowering in temps across idle all the way to full throttle.
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Trevor Filipowski
> 3 dayWorth the price. Reduced case temps, runs quiet.
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Tim Holder
Greater than one weekNice addition to my Noctua NH-U12S Redux and keeps my i5-12600k plenty cool. A little difficult to add on but thats because I clipped on while heatsink was still in my system and its a tight fit for my hands, but a great product.
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Iván Lopez
Greater than one weekPerfecto para el procesador 5600x y 5800x. La marca ofrece mucha información para seleccionar de forma correcta el sistema de refrigeración adeacudo para el eso que se le va a dar al procesador.
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Michael P. Thompson
> 3 dayI used mine to replace the 92 mm fan on my Noctua NH-L12 cpu cooler. It fit and functions perfectly in this application.
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.