Here is a good video reviewing the Radeon VII 16GB showing the AMDs review guide of how to make the cards with 8GB or less struggle like the RTX 2080 that was used in the review with 8GB and if you watch the video AMD clearly knows what games that will use more VRAM if allowed and what games will struggle with 8GB or less video cards. Anyone remember FarCry6 and such shenanigans, this proves this has been going on a good while.
Also what this video shows that even in 2016-2019 8GB was really not enough for 4K for some games and well we know what will happen to 10GB soon and maybe even 12GB cards.
Remember the Radeon VII came out in the start of 2019.
From 8 minutes 40 secs
Quick link to the time stamp.
https://youtu.be/7j2PFKkYrVg?t=520
From AMDs Review Guide for the Radeon VII.
Watch the video fully to get a good idea what is going on and why Nvidia plays the low VRAM on some cards, it is basically planned obsolescence to make you update sooner if you want high resolutions like 4K with in game higher settings, you can see even in the screenshot from the review guide there is games that used way more than 8GB even when they came out in 2016 (rise of the tomb raider as the example from the screenshot, using 9.8GB in highest settings mode, humm that's basically 3080 10GB levels in 2016, watch the rise of the tomb raider tested in the video how it makes the RTX 2080 struggle when it was doing better than the Radeon VII in most other games, also in the test is a 1080ti with 11GB and well it was almost twice as fast (playable no stutters) in the same test due to the 11GB VRAM compared to 8GB on the RTX 2080 (unplayable stuttered like crazy). RTX 2080 and 1080Ti are basically the same performance cards, but different VRAM amounts installed.
Now the question is ..is it a game issue or Nvidia driver issue too at the time of testing? I wonder if anyone with Rise Of The Tomb Raider, an RTX 2080 and a 4K screen can test it in 2022 with all the game updates and latest drivers on the same part of the game he shows with the problems. This will prove if it was the game that needed patching or the Nvidia drivers at the time causing these issues too or is it just not enough VRAM or VRAM bandwidth as the Vega 64 with 8GB HBM2 had no problems in the test.