nope not saying that at all but in layman’s terms if I put a 3080 onto RDR2 for instance and crank everything at ultra 4K it simply won’t let you as you get the error saying you’ve hit the VRAM limit at about 9.5Gb as it won’t let you use more than 90%. This doesn’t happen with the 2080ti. Same with cyberpunk and especially with doom eternal on nightmare settings. Plenty of threads out there about this subject. Normally it means dropping one or two settings from ultra to high to get under vram limit but that doesn’t bode well for the next few years of game development at 4K at all hence my quandary.
Easy fix do not game at 4K, you get low framerates in any case, hardware is not up to 4K ultra settings yet still a few years away for that. Will also need your own generator to supply the power.