Review on 🌀 Noctua NF-R8 redux-1800 PWM: High Performance 4-Pin Cooling Fan at 1800 RPM (80mm, Grey) by Pin Mu Lin ᠌

Well, if not for the price, the impression would be excellent. Very quiet fans. Bought to replace GP D80BH-12 in UPS. The airflow seems to be not bad (when compared, for example, with the Deepcool UF80), but it is significantly (it seems that at times) lower than that of the GP D80BH-12, although the declared characteristics of Noctua are higher in terms of flow. In this connection, two pieces had to be installed in one UPS. At the same time, you can hear them only at night when the equipment is turned off (they work 24/7).