Review on 🌀 Wathai 80mm x 25mm PWM Fan, High Speed 5000RPM 12V 4Pin Fan, DC Brushless Cooling Fan, Large Airflow Fan by Justin Bishop

I bought this to replace my Synology NAS 80mm fan. This fan has the same RPM, slightly more CFM but less noise than the original YS Tech 4-pin PWM fan. Although it's thinner. Works perfectly, but much quieter. Don't get me wrong, you can still hear the noise at a full 5000 rpm. But when the fan speed is set to cool or silent you don't hear anything, much better than the original. Don't believe the Noctua fan, as many so-called experts have advised. Yes . These Noctua are very quiet, but you have to understand that the Noctua fan has a maximum speed of only 2000 rpm and this fan is a 5000 rpm fan. Synology has opted for a 5000RPM fan to cool the internal heat. How do you replace a 5000 rpm fan with a 2000 rpm fan? I don't think it's a good idea.