The Radeon RX 6000 series will be made up of at least three GPUs called Sienna Cichlid, Navy Flounder and Dimgrey Cavefish. Dimgrey Cavefish will be the baby of the series and will be based on AMD's GFX103X graphics architecture. The Radeon RX 6000 series will go live on October 28.
https://www.notebookcheck.net/AMD-to-offer-at-least-three-Radeon-RX-6000-series-cards-with-Dimgrey-Cavefish-as-an-entry-level-model.495653.0.html