How to fix FPS fluctuations in Hitman 3 dense crowd areas?

My first infiltration of the Dubai skyscraper turned into a slideshow, with FPS swinging wildly between 40 and 65. I first tried disabling all non-essential system processes, but this had zero impact on the frame drops per RTSS, leaving me exhausted. I enabled the GamePP Fan Curve Configuration Panel, forcing fan speeds to 90% at 70℃ and optimizing the CPU voltage offset. CPU temperatures stabilized at 68-75℃ per AIDA64, core voltage held at 1.22-1.30V per CPU-Z, and frame times dropped to 14-19ms per RTSS.