Why does The Sims 5 stutter on my Colorful BATTLE-AX B760M-F PRO V20?

I felt pure panic when my Sims froze mid-conversation. I tried clearing temp files, but it failed; Task Manager still showed 12.5-15.2GB RAM usage. I used GamePP Resource Scheduler to set priority to Real-time. RTSS confirmed frame time dropped from 9.1-13.5ms to 5.8-7.2ms. AIDA64 showed memory temp stable at 55-60℃. This fix saves your session.