He works quite quietly and can be heard in my PC hard, even at high rotational speed. The heat in graphics card took on the installation of the fan from noticeably! So he met with its 1350 revolutions per minute the job.
It is also interesting that the connection of the fan is 2 poles. The fan speed has to be so controlled by voltage if desired by the owner.
The 6 years manufacturer's warranty is not too shabby either.
Conclusion: a useful fan for reasonable money.
