Noctua NF-A15 PWM, Premium Quiet Fan, 4-Pin (140mm, Brown)

Its like a tornado, on mute.

This fan seems like a good fan, but is not the same fan that ships with the NH-D15. The key difference is that this fan runs at a max of 1200RPM while the NH-D15s NF-A15 runs at 1500RPM.

Spins faster, is quieter, and better preforming than any fan Ive ever had.

I just had this installed as a case fan.

As expected, better than my previous purchase. Glad to get everything in working order

What can I say except that it is quiet and Im willing to pay for silence. I built a new desktop computer and researched the quietest cases, CPU coolers etc and then changed some of the fans to these. I cant hear it. I love the silence. The motherboard PWM controller works with these fans perfectly.

Great fan. Very quiet. Only negative is appearance. These are some ugly fans. I highly recommend. It seems to be a high quality fan and should last a long time.

Excellent fan. Perfectly silent while still moving significant amount of air.

My pc has been loud for quite a while. After installing this fan on my heatsink (Geminii S524), I noticed a HUGE difference in sound. As the title states, I can no longer hear it (well I can but the noise heard is so insignificant).

okay for what you will, are silent and gives the revolutions that offer, which does not really like is that there is variety of colors.