Nothing beats the heat better than fans. They are fast and efficient, which is precisely why they remain the cooling solution of choice even if your PC has liquid cooling in place. Well, unless the liquid in question is 3M Novec/Fluorinert as used in the Gigabyte Fish Tank PC. Then that would be a different story. Fancy, high-tech liquids aside, would it even be possible to rely solely on passive cooling?
A YouTuber, Felix, from Billet Labs decided to answer a question nobody sensible would ask: Can you cool a high-end gaming PC with zero fans? The result is a gloriously overengineered passive water-cooled PC made from polished copper pipes, stripped-down radiators, custom brass fittings, and enough shiny metal to make it look like steampunk plumbing art.
The build uses a Ryzen 9800X3D and RTX 5080 cooled entirely through stacked radiators, relying on natural airflow instead of fans. Felix spends most of the video hand-building the loop, soldering copper pipes, polishing everything to a mirror finish, and accidentally destroying a radiator by using screws that were too long. Classic DIY moment.
Surprisingly, the system actually works. It can idle almost silently and run games like Halo 3 comfortably, but once heavier loads hit, the water temperature climbs into “please do not touch the pipes” territory at around 60°C (140°F). The GPU survives fine, the CPU starts throttling, and eventually even the power supply fan gives up on the “fanless” dream and spins up anyway.
In the end, Felix concludes that the internet was right: fully passive cooling is wildly inefficient for modern high-performance PCs. Still, the experiment was a success in another way because the machine looks incredible, taught him a lot about airflow and radiator design, and proved that with enough copper, stubbornness, and polishing socks, you can technically game on a giant heated sculpture.
Well, I guess a true fan-less, passive-cooled remains a pipe dream—or should I say many pipes dream. Anyhoo, skip ahead for the video of this creative experimental build.
Images: Instagram (@billet_labs).
Story via Instagram (@digitaltrends).
