I get 42% VRAM usage with a Asus ROG Strix 3090 OC.
CPU utilisation is 11% (Ryzen 9 5950X)
8GB RAM MSFS 2020 is current using (3 hours into a flight) / 64GB.
That’s with everything on max graphics options wise.
To be fair, that is some accomplishment considering how good the sim looks.