Review on 🔥 Argon Raspberry Pi 4 Mini Fan HAT: Built-in Heatsink with On-Off Switch for Full Control, 2-Pack of RPi Fans by Lamar Vanderburg

I overclocked to 2.147GHz. I've seen temperatures in excess of 60 with a heatsink and a 40mm fan stress testing the CPU. This keeps it under 55. PWM works well, the fan is noisy when you get close to it. it would be cooler if he covered the ram as well. Edith pulled out the heatsink, aka extruded aluminum. Airflow is super restrictive. Filed the holes to open the airflow, I'm idling at 33 degrees Celsius, the stress test temperature is around 50 degrees Celsius. Not bad for 2 fans and tools for under $20.