Custom-built passive water-cooled PC relies on convection chimney effect powered by triple-stacked radiators — 9800X3D build with RTX 5080 has no fans, copper, and radiator chimney, but struggles to keep temperatures down

Tom's Hardware: For The Hardcore PC Enthusiast [Unofficial] May 19, 2026

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Innovative London-based PC cooling firm Billet Labs builds and showcases a completely passive, fanless, gaming build.