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

https://www.tomshardware.com/author/mark-tyson· May 19, 2026 · 10:00 AM UTC ·5 min read · 0 reactions · 0 comments · 31 views

#technology #gaming #hardware #Billet Labs #Felix #AMD #Nvidia

TL;DR · WeSearch summary

Billet Labs has introduced a custom-built passive water-cooled PC that utilizes a convection chimney effect with triple-stacked radiators. This fanless design features high-performance components but faces challenges in maintaining optimal temperatures. The build aims to provide a quieter gaming experience compared to previous models that included fans.

Key facts

▪The new PC features an AMD Ryzen 7 9800X3D processor and an Nvidia GeForce RTX 5080.
▪It employs a unique radiator chimney design to enhance cooling without fans.
▪Previous models from Billet Labs, like 'Raddy', included fans and were noisier during operation.

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Tom's Hardware · https://www.tomshardware.com/author/mark-tyson

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Original publisher	Tom's Hardware
Canonical URL	https://www.tomshardware.com/desktops/pc-building/ambitious-modder-creates-custom-passive-water-cooled-pc-9800x3d-build-with-rtx-5080-has-no-fans-copper-and-radiator-chimney-struggles-to-keep-temperatures-down
Publication time	Tue, 19 May 2026 10:00:00 +0000
Retrieval time	2026-05-19T10:04:57.575Z
Last seen	2026-05-19T10:05:06.072Z
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Opening excerpt (first ~120 words) tap to expand

Desktops PC Building 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 News By Mark Tyson published 19 May 2026 But its use of copper and radiator chimney design makes it 'a piece of cyberpunk modern art.' When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Billet Labs) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter Innovative London-based PC cooling firm Billet Labs is back with another water-cooled system,…

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