The RTX 2080 Ti has been modded to support 22 GB of VRAM. NVIDIA's former flagship card comes with 11 GB of VRAM as standard, but the company left in the ability for it to use double its default capacity.
https://www.notebookcheck.net/NVIDIA-GeForce-RTX-2080-Ti-modded-to-support-22-GB-of-VRAM.538934.0.html