https://wccftech.com/amd-radeon-big-navi-21-gpu-505-mm-die/

The user AquariusZi over at PC Shipping forums has been one of the most reliable source of leaks in the past and they have just posted (via KOMACHI_ENSAKA) the die sizes of AMD's upcoming 'Big Navi' lineup. The 7nm flagship in question, which could likely be called the AMD RX 5950 XT (or anything else really, AMD is free to shake things up you know), will feature a huge 505 mm² die that based on simple maths will offer at least 2x the performance of the 'smol Navi' RX 5700 XT GPU. Still, while the user has been reliable in the past I will always urge a grain of salt when the information stems from a single source and has not been verified.

It's not just the Navi 21 GPU that has had its die size exposed either, the Navi 22 and Navi 23 will be clocking in at 340mm² and 240mm² respectively. Navi 23 is likely going to be a successor for the current generation flagship, the RX 5700 XT. The source has also mentioned that these measurements have an error of 5mm² give or take. Considering the RX 5700XT is exactly 251mm² the die size for the Navi 21 makes a lot of sense.