The next generation of GPUs coming from both AMD and Nvidia have been broken down into subsequent chips, models, and manufacturing process by a well-known leaker. The breakdown is a best guess scenario, with one of the tipster's followers offering suggestions of relative VRAM amounts.
https://www.notebookcheck.net/Next-gen-AMD-RDNA-3-and-Nvidia-Lovelace-GPUs-broken-down-into-potential-chips-and-graphics-card-models.599703.0.html