Noctua NA-FK1 Redux, Second Fan Upgrade Kit for NH-U12S Redux Cooler

This 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.

The fan is quite silent under 1500rpm and is a really good fan for keeping your processor cool. The brackets only fit on nocrua coolers, so if you have any other cooler youll meed their specific brackets in order for this to work.

Mounts great to NH-D15 if memory slot issues cause a 140mm fan to be too big. In my case I could not get the door of my PC installed because the 140 was to tall. This 120mm allowed to to install the case door.

Cant go wrong with this one. High quality product for a great price. Ease of installation depends on how tight of a fit your case is, but its the same thing as the fan that comes with the cooler.

Very happy with purchase. Love the Noctua products. Great and reliable products. In the last 3 years, I have only purchased Noctua fans and CPU coolers on all of my builds..

I was wary because they are suspiciously low priced, but the noctua quality is there. Would recommend.

Did bring down my temps from the usual 70c on load in my hp omen case to 53c on my meshify c case that had 3 intake and 3 exhaust fans. Had in a push/pull config on the cpu..

Muy buen producto, llego a tiempo, lo ocupo con un i5 11400 que suele ser un procesador muy caliente y las temperaturas no pasan los 50°c y mientras no se ocupa sus temperaturas bajan hasta 20°c lo cual ed genial, recomiendo ocupar una configuracion de 2 ventiladores con el kit extra para una refrigeracion mas eficaz y menos ruidosa.

I 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.

Bought this upgrade for the heatsink I installed in my new rig and this fan was super easy to install with its quick connect brackets. Fan feels well constructed and is very quiet so far. Id recommend this.