Gaming PCs with powerful components like the Nvidia GeForce RTX 5080 typically rely on fans to keep temperatures in check. Fans, however, bring noise and dust concerns that can detract from the experience. What if you could run a high-end gaming PC completely fanless? Billet Labs, a UK-based PC water cooling specialist, recently demonstrated a steampunk-style build that attempts just that.
- Uses passive water cooling with no fans on CPU or GPU
- Features AMD Ryzen 7 9800X3D and Nvidia GeForce RTX 5080
- Relies on large heat sinks connected by coolant circulation
- Performs well but runs hotter than typical fan-cooled setups
Passive Water Cooling Without Pumps or Fans
The key to this build is a passive water cooling system that has no fans or pumps. Instead, three sizable heat sinks—measuring 40 x 20 cm, 28 x 14 cm, and 24 x 12 cm—are connected by coolant that moves solely through temperature-driven circulation. Heat from the CPU and GPU heats the coolant, which then rises and moves to the heat sinks where it cools down naturally.
This approach eliminates noise and mechanical parts, creating a more serene gaming environment. The motherboard, a Gigabyte Aorus Pro B850, is mounted on a thick aluminum plate with thermal pads to help spread heat evenly.
Handling Heat with a Ryzen 7 9800X3D and RTX 5080
Even without fans on the CPU and GPU, the system performs surprisingly well. At idle, coolant temperatures hover around a cool 28 °C. Under CPU stress using Cinebench, coolant temperature rises to 39 °C and the CPU reaches 90 °C after 30 minutes without throttling performance.
However, when the GPU is also stressed—like gaming in Cyberpunk 2077—the coolant temperature climbs above 55 °C. While performance remains stable, these temperatures exceed typical recommendations for long-term hardware health.
The Trade-Offs of Fanless Gaming
The most significant trade-off is thermal management. While the silent operation is appealing, the higher operating temperatures may reduce component lifespan or require more frequent maintenance. The motherboard and power supply still use fans, so the system isn’t entirely silent, but the loudest components are quieted.
This setup makes more sense for enthusiasts focused on noise reduction and unique aesthetics rather than those seeking maximum overclocking headroom or extended heavy gaming sessions.
Price and Availability Context
The Nvidia GeForce RTX 5080 currently lists around $1,299, positioning this build in the premium segment. The specialized cooling parts from Billet Labs and the custom modding involved will add to the cost and complexity. Availability may vary outside the UK, and buyers should consider regional parts and support options.
Consider It If…
You want a near-silent PC with strong specs and enjoy modding unique cooling solutions. It’s suitable if you can tolerate warmer operating temperatures and prioritize style and noise reduction over absolute thermal efficiency.
Skip It If…
You rely on maximum performance under long gaming sessions or want a straightforward, widely supported cooling solution. The elevated temperatures may limit the hardware’s longevity in demanding use cases.
(Via)
