Why does Destiny 2 freeze during raids with Kingston HyperX Fury?

I was losing my mind during high-intensity raids; those particle effects caused the screen to freeze for 0.4s, totally killing my combat flow. I tried closing every single background startup item in Windows, but my available memory only increased by 120-280MB per GamePP Hardware Sensor, which did nothing for the stutters. Finally, I used the GamePP Resource Scheduler to force the game process to Realtime priority and capped non-core CPU usage below 4%. After that, RTSS showed frame times converged to 9-13ms from 14-31ms, and AIDA64 monitored memory temps at 45-51℃.