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00:00 Intro and talking about what I will be testing
00:19 What is a Contra Fan
03:12 orientations I will be testing
04:03 The experiments
05:27 Why Contra Fans?
06:49 Case Airflow Noise Normalized
08:49 Case Airflow Noise Normalize #2
10:03 Case Airflow 100% PWM
11:22 Noise vs Airspeed Case Airflow
13:12 Sound recording and Noise Levels
14:33 Performance Thru Noctua U12A cooler
18:12 CFM performance Noise vs Airspeed
18:55 CFM performance Noise Normalized & 100% PWM
20:10 Takeaways
22:37 Final Conclusion
![](https://i.ytimg.com/vi/5gQBUJ-F26Y/maxresdefault.jpg)