How to remove micro-stutters in Code Vein II on Jginyue X99M?

I noticed subtle stutters despite having 60 FPS; GamePP sensors showed uneven core loads and frame times swinging from 16-40ms per RivaTuner. I tried closing all background programs, which lowered RAM usage, but it didn't touch the underlying scheduling latency. I used the GamePP Resource Scheduler to lock CPU affinity to physical cores 0-7 and set the priority to Realtime. This worked; frame times converged to 12-16ms per RivaTuner, and the CPU stayed at 70-76℃ per AIDA64, with voltage at 1.2-1.3V per HWiNFO64, hitting 76℃