Modder Uses 110cm Chimney for Passive PC Cooling
German modder der8auer utilized a 110cm 3D-printed chimney to achieve a 19-degree Celsius drop in AMD Ryzen 7 9800X3D temperatures.
Hardware modder der8auer has demonstrated the effectiveness of the stack effect for passive PC cooling using a custom 3D-printed chimney. The experiment featured a water-cooled test bench equipped with an AMD Ryzen 7 9800X3D CPU. By leveraging natural convection, a 10cm chimney initially provided a 0.5-degree Celsius reduction, while a 30cm version lowered water temperatures by 5 degrees over 30 minutes. The final 110cm assembly significantly improved performance, bringing water temperatures down to 50 degrees Celsius. According to HWiNFO data, the 110cm chimney reduced peak CPU temperatures from 90 degrees Celsius to 71 degrees Celsius, marking a total drop of 19 degrees. Airflow through the radiator was visualized using a fog machine to confirm the chimney's efficiency in catalyzing heat dissipation without active fans.