Here's Big Navi in the flesh, Navi 21 GPU powers Radeon RX 6900 XT
Navi 21 vs Navi 22 floor plan comparison (Speculation - 40CUs + 96MB Infinity Cache + 192-bit bus + 12GB VRAM) : r/Amd
AMD Navi 21 GPU Specs | TechPowerUp GPU Database
Navi 12, 14, 21, and Lite variants of AMD's latest GPU range revealed in Linux driver code; RX 5800 could take on the GeForce RTX 2080 - NotebookCheck.net News
AMD Navi 21 XT GPU: up to 2.4GHz game clock, 250W+ TDP, 16GB GDDR6
AMD Radeon RX 7900 GRE ASIC Smaller than Navi 31, Slightly Larger than Navi 21 | TechPowerUp
AMD Radeon RX 6900 XT specs: Navi 21 GPU with 16GB could cost $499
AMD Navi XTXH, XLE, and Nashira Point variants spotted on USB-IF: XTXH could be a possible Navi 21 variant with HBM2(E) support - NotebookCheck.net News