Review on 🌀 Wathai 40x40x20mm 5V 2Pin DC Case Fan: Efficient Brushless Cooling Solution by Steven Guevara

They blow about 50% more air than the Noctua equivalent Noctua NF-A4x20 FLX and are not very loud in comparison. I replaced the superfluous power supply fans, which were very loud, with Noctua, which, however, triggered an alarm due to overheating under heavy load. When I replaced the Noctua with the Wathai, the alarm stopped working and the background noise remained quite acceptable. I'm so glad I found such fans!