Overclocker der8auer has explored an unusual PC cooling idea: using a tall 3D-printed chimney to move heat away from a radiator through natural convection instead of relying on attached fans. The test focused on a water-cooled Ryzen 7 9800X3D and used a modular duct design that could be extended vertically.
According to the reported results, the tallest setup reached 110cm and brought the CPU reading down from 90°C to 71°C. The experiment suggests that a strong vertical airflow path can help pull warm air upward and improve heat removal, even in a fan-free configuration.
The concept is notable because it looks at whether radiator cooling can benefit from simple physics rather than active airflow. By stacking a long chimney above the radiator, the design aims to strengthen the natural rise of hot air and turn that effect into measurable thermal gains.
While this appears to be more of a proof-of-concept than a practical case design for most users, the result is still striking for PC cooling enthusiasts. It shows that a modular 3D-printed duct, paired with a water-cooled Ryzen 7 9800X3D, can significantly lower reported temperatures under the right test conditions.
