Slow CPU fan speed

[michael]

do you use the original Metal Case?
Then you might check

AirFlow on SATA HAT quad

I’m looking to my RPI4 with SATA HAT Quad… 1 fan on CPU under HDD 1 fan on top of HAT. All extract air outside. But I’m in doubt regarding CPU FAN entry airflow. Not sure holes under SATA HAT kit provide enough entry point. May be usefull to add hole on lateral of body ? Or add a fan in push to under plate (with appropriate support ) ? Any feedback from engineers team about theses questions ?

Heat issue solved by separating SATA HAT and Pi

[21011788] This article describes in three phases how to achieve an almost fan less SATA HAT with maintaining the lifetime of the equipment. Phase I „everybody could do“ Phase II „read HDD temps“ Phase III „bigger display“ Disclaimer: The modifications in this article are based on my experiences and if you find them useful to use you do so at your own risk. The major issue to solve was that the Pi even in idle generate a lot of heat and this raising up heat is additionally heating the on …