The fans were not used in a computer but in a project for pure airflow. The noise of the 6 fans in a row is minimal and the airflow is quite satisfactory. As for the build quality, it is understandable that it may not be the best at this price, but it is worth its money.

Completely silent and relatively high-quality. Don't expect it to perform miracles. On a computer with an Atom 525 processor, on which a passive cooler with a patent was installed, it maintains a stable temperature of 30-40°C under full load. Power consumption measured at 1.5-2W.