AMD Radeon RX 6900 XT LC with Navi 21 XTXH GPU has been tested - VideoCardz.com
AMD Navi 21 XT GPU: up to 2.4GHz game clock, 250W+ TDP, 16GB GDDR6
AMD Radeon RX 6000 Series Flagship (Navi 21 XT) to Feature 2.4 GHz Game Clock, 16 GB of GDDR6 VRAM, and 255 W TGP?
Navi 31 powered AMD Radeon RX 7900 XT could offer a 2X performance uplift over its Navi 21 toting counterpart - NotebookCheck.net News
AMD Radeon RX 6950XT features Navi 21 KXTX GPU, supports Hynix and Samsung 18Gbps memory - VideoCardz.com
AMD Radeon RX 6900 XTX Graphics Card Rumored To Feature 18 Gbps GDDR6 Memory, Increased Clock Speeds With Navi 21 XTXH GPU, Faster Than RTX 3090
Mysterious Radeon RX 6800 'Navi 21' Card with 8GB of GDDR6 Spotted | Tom's Hardware
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