Posted by a reviewer on Amazon

You do need though to alter the settings in your software to reduce the speed below 1000 rpm if you want them to be absolutely silent

Posted by a reviewer on Amazon

Run at full speed the fans inevitably arent silent its mostly wind noise from the volume of air theyre blowing but once you adjust the rpm to be controlled by software the rpm drops as low as zero yep they stop spinning if the case is below your target temperature

Posted by a reviewer on Amazon

Which software you use to control the fans will depend on your motherboard many come with fan control software or you can try standalone app speed fan

Posted by a reviewer on Amazon

Mine run at about 500 rpm most of the time and are completely inaudible

Posted by a reviewer on Amazon

Better performance and most importantly massive reduction in noise

Posted by a reviewer on Amazon

I purchased these in place of the standard fans supplied with the corsair 100i cpu cooler the reason behind this move down to the level of noise generated by the stock fans when running the corsair link programme balanced mode

Posted by a reviewer on Amazon

Hands down best case fan iv ever usedcome across the work it puts in is crazy and the noise level it puts out is next to none existent in my fractal define v5 case brilliant job noctua

Posted by a reviewer on Amazon

Full of adapters and spliters it hurts the color they continue to make but it is the characteristic color of the signature noctua