be quiet! Silent Wings Pro 4 120mm PWM 3000 RPM Premium Low Noise Cooling Fan | 4-Pin | BL098

Customers find this fan incredibly quiet, with sound levels comparable to a room air purifier, and appreciate its performance as one of the best 140mm fans on the market. They praise its build quality, with one customer noting the thick material on the fan and blades, and its cooling capabilities, particularly its ability to lower CPU temperatures. Customers like the manual speed control feature, with one mentioning the three different speed profiles, and appreciate the airflow, with one noting it performs well at low RPMs. While some customers consider it well worth the money, others find it pricey.