Heya! Thanks for Playing! ^^ The main intensive operation on High is with Unreal Engine 5's Lumen for the lighting and reflections. Medium and Low disable Lumen which decreases drastically the requirements. I did some tests and to run stable 60fps on High at 50% res scale you'd need at least a 2070 I think, which the RX 580 is under. Medium should be easy enough for your card to run tho.