Lenovo has introduced the ThinkStation P350 Tiny, the smallest workstation in the world. The 1.3 kg machine has a 1 litre chassis that is 3.7 cm thick. Lenovo has still managed to include an Intel Core i9 Rocket Lake processor and a dedicated NVIDIA GPU.
https://www.notebookcheck.net/Lenovo-ThinkStation-P350-Tiny-The-world-s-smallest-workstation-fits-an-Intel-Core-i9-Rocket-Lake-processor-in-a-1-3-kg-and-1-litre-chassis.550927.0.html