Low brand price, but top performance
Replacing 2 ageing silent wings 3 high speed on an AIO watercooling radiator, they do the job bloody well, performing better because of fewer air leaks with its classic frame and better static pressure. The liquid has gained around 4°C
As for noise, at 100%, they do make themselves heard, but much less than other brands. In my case, I made sure they didn't exceed 75% in play for a more than reasonable noise and at rest, at 33%, for them to become completely inaudible ^^.