Why does DEATHLOOP FPS drop from 80 to 30 on Crucial RAM?

Moving quickly through the loop, my FPS would plummet from 80 to 30 without warning, totally ruining the stealth feel. I tried enabling 'Ultimate Performance' in the Windows Power Plan, but my CPU temperature hit 92℃ per AIDA64, causing severe throttling. I then used GamePP Resource Scheduler to lock CPU affinity to high-performance cores and set priority to High. Now, multi-core response speed has increased by 7% per Cinebench, and CPU temperature is stable at 72-78℃ per AIDA64.