Review on 💨 Ultra-Quiet BE QUIET! Pure Wings 2 92mm PWM Cooling Fan - BL038 for Efficient PC Cooling by Caleb Eichbauer

Airflow 33.15 CFM according to packaging. I wish it was stated in the description, hope it helps someone. Great fan, looks sturdy and feels good. Completely silent, my Mac fans are louder than that and that's saying something because I frigging love my Mac. I like the ridges on the blades, they seem to help with cooling. I bought this to replace the old noisy stock fan on my replacement Dell Optiplex 780 SFF PC with an Intel Core 2 Quad Q9650. I used Prime95 to test the CPU under full load and used Hardware Monitor to check the temperatures before and after the fan swap. At full load, the maximum temperature dropped a whopping 14 degrees from 76F to 62F, and I never heard a fan. The OEM fan sounded like a jet engine at full load, which was completely unbearable. FYI if you buy for Dell the caps on the fans are different and Dell couldn't just make a straight line, they had to twist the wires (typical Dell) so a little modification is required to connect to a PCB to be manufactured in a small form factor. You can just look under the sticker on both fans to find out the correct wiring order, luckily the boards are labeled but be careful you could fry the board or set the house on fire!