Microsoft Flight Simulator 2024: still the most demanding sim
MSFS 2024 produces photorealistic visuals by streaming real world data. The combination of high resolution textures, complex flight model calculations, dynamic weather and dense urban scenery makes it genuinely the hardest mainstream PC game to run smoothly at 4K.
For 4K play we recommend the RTX 5090 alongside a Ryzen 7 9800X3D and at least 32GB of DDR5-6000. Storage matters too: a fast Gen 4 NVMe primary drive plus a separate 2TB or 4TB drive for sceneries and add-ons.














