AMD says 'Something BIG is coming', likely Radeon Pro with Navi 21 GPU - VideoCardz.com
AMD Navi 21 "Big Navi" GPU stack leaks, budget gamers may have to contend with a Navi 10 Refresh rather than pinning hopes on Navi 23 - NotebookCheck.net News
AMD Navi 21 will have 80 CUs combined with RDNA 2 and hardware ray tracing
AMD Big Navi and RDNA 2 GPUs: Release Date, Specs, More | Tom's Hardware
AMD Navi 21 GPU Specs | TechPowerUp GPU Database
Mysterious AMD Radeon RX GPU Based on Navi 21 & 8 GB GDDR6 Memory Spotted