Why does Resident Evil 9 stutter when facing monster crowds?

While sneaking through a gloomy corridor, the screen suddenly suffered from severe tearing. I tried enabling 'Ultimate Performance' in Windows power options, but CPU temperature hit 94℃ and triggered throttling, which made me anxious. I then used the GamePP Resource Scheduler to manually bind the game's main thread to high-performance cores. Frame generation time converged to 13-17ms per RTSS, CPU temperature stayed at 76-82℃ per AIDA64, and clock speeds remained stable at 3.4-4.2 GHz per CPU-Z monitoring.