Any particular reason you’re thinking about the 6800xt over the 3080? Just curious. While the Smart Access Memory and increased VRAM sound like they could be reasons to give the 6800xt an advantage, turns out they don’t have any real affect on Flight Simulator. Meanwhile, the 3080 is bench marking significantly better than the 6800xt in some Flight Simulator tests:
The real tragedy in the above test is that 6900xt, which couldn’t beat Nvidia’s $300 cheaper 3080. AMD hit it out of the park with their CPUs this round, but their GPUs came up a bit short.