Recently, the Billet Labs team shared the latest progress on their DIY cast iron chassis project: a gaming PC that’s as hardcore as they come, tipping the scales at a hefty 99 kg. This beast of a machine boasts a water-cooling system ingeniously repurposed from a 19th-century Victorian-era cast iron radiator, which now cradles an impressive 18 liters of coolant.

At its heart, the system is powered by a Ryzen 7 9800X3D processor, an RTX 5080 graphics card, and 32GB of memory. Leveraging cutting-edge 3D scanning and printing technology, the team crafted custom brackets to flawlessly integrate modern hardware into the base of the radiator. To further enhance cooling efficiency, three ultra-slim 120mm fans were added to aid in heat dissipation.

Real-world testing reveals impressive thermal performance. While running Spider-Man 2, the coolant temperature maintains a steady 26°C, with the CPU and GPU averaging 60°C and 65°C, respectively. When pushed with Cyberpunk 2077, the coolant warms up slightly to 29°C, while the CPU and GPU temperatures rise to 68°C and 69°C on average. During a combined Cinebench and FurMark stress test consuming 520W of power, the coolant temperature peaked at 29.25°C, a mere 13.25°C above ambient.

Despite its jaw-dropping performance, the PC’s 99 kg weight makes it a stationary marvel rather than a portable powerhouse. And when it’s running, it kicks out heat like a radiator, turning your gaming space into a cozy—if slightly toasty—haven.