The Intel NUC 11 Extreme may have an 8-litre chassis, but it can house up to an Intel Core i9-11900KB processor and an NVIDIA GeForce RTX 3090 GPU. The fastest NUC yet can finally be pre-ordered too, and in multiple configurations.
https://www.notebookcheck.net/Intel-NUC-11-Extreme-Beast-Canyon-mini-gaming-PC-can-now-be-pre-ordered-with-up-to-a-Core-i9-11900KB-processor-and-NVIDIA-GeForce-RTX-30-series-GPUs.551990.0.html