Im having performance issues too. It's fine in clear sky but the second I add weather it stutters very bad. I, too, have a good system (Ryzen 9 7950x3d, 4070ti, 32GB ram) and have no issues with other high-end aircraft. Twice flying this aircraft since installing update 1.0.3 I've had the BSOD. Last time I had a BSOD was years ago.