A PC modder created a “Superdome” side panel filled with Noctua fans to improve cooling performance. The Major Hardware YouTube channel built the design with 15 Noctua NF-A12x25 fans, and tests showed it noticeably lowered CPU temperatures compared to a standard panel.
Replacing the standard tempered glass, the Superdome introduces a rounded side panel that channels intake airflow across the full side of a Lian Li O11 case. The concept builds on feedback from the creator’s earlier Fanhattan Project, where viewers requested a version using full-size Noctua NF-A12x25 120mm fans instead of smaller ones.
During tests, installing the Superdome on the front of the PC lowered temperatures by around 20°C. The creator described the result as “pretty incredible” and noted that noise remained fairly controlled.
The Superdome concept originated from viewer feedback. After the Fanhattan Project, many suggested recreating it with full-size fans. At around $40 per NF-A12x25, the total cost would have surpassed $600, but Noctua provided the fans and matching 3D printing filament for the enclosure.
The dome was designed to fit 15 fans: one at the top, five in the middle, and nine arranged in a ring at the base closest to the case. The layout required balancing symmetry, airflow performance, and the size limits of the 3D printer.
The printing process took several days to complete. Using Bambu Lab H2D and H2S printers, the creator produced the dome with minimal segmentation, though the job stretched the machines to their limits. The finished build resembles a compact wind tunnel, with a spherical array of Noctua fans directing airflow straight into the case.
After being installed on the side of a Lian Li O11 case, the Superdome significantly altered the system’s airflow. All 15 fans were set as intake, generating strong positive pressure inside the chassis. The creator described the setup as “pretty quiet,” though he noted that cable management was tricky, with any loose wiring near the blades posing potential issues.
Testing with Battlefield 6 showed a clear difference. With the standard glass side panel installed, CPU temperatures peaked at around 86°C, according to AMD’s Ryzen Master software. Replacing it with the Superdome reduced temperatures to roughly 67°C under the same conditions, largely due to the increased intake of fresh air.
With the 3D-print files published on Thingiverse, Major Hardware has effectively open-sourced the design, allowing users with compatible Lian Li O11 enclosures and adequate fan capacity to replicate or iterate on the concept.
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