How to fix 45 FPS drops in Death Stranding with Zotac RTX 5070 Ti?

Crossing rugged mountains, my frame rate would drop from 80 to 45 FPS without warning, which is devastating for immersion. I tried lowering Ambient Occlusion in-game; frames increased by 5, but the visual quality loss was severe and made me quite angry. I used the GamePP Image Sampling Calibrator to lower the sampling weight to 0.85 and increase sharpening to 65. Now, frame generation time is stable at 13-17ms per RTSS, and GPU temps stay between 66-72℃ per AIDA64. No more sudden drops!