Jak pise Tynyt, VRAM neni o "4k". Staci se podivat na testy Doom-a, k jakemu propadu dojde treba u NV 3070 vs 6800, ktera (sice ve 4k) narazi na limit u maximalniho nastaveni textur.
https://static.techspot.com/articles-info/2146/bench/4K-Doom.png
vs
https://static.techspot.com/articles-info/2146/bench/1440p-Doom.png
"At 4K, the RTX 3070 seems to be running out of VRAM as the game requires 9GB of memory at this resolution and settings. As a result the RX 6800 extends its lead to 31%, going from 120 fps right up to 157 fps."