Review on High Speed Big Airflow 8cm 80mm x 80mm x 25mm DC Cooling Fan - GDSTIME 4500RPM, Dual Ball Bearing, 12V, Brushless by Damon Fuqua

I bought 2 of these for the CNC controller cabinet. These things are noisy, but that's not a problem for the environment they're used in. But this volume is achieved by the very large airflow needed to cool my controller. I recommend them for use in noisy environments like workshops due to the amount of air being moved, but I do not recommend using them in PC cases or other locations where noise would be an issue.