Why does The Witcher 3 Next-Gen stutter in crowded cities?

Riding through Novigrad streets, I felt sudden, unpredictable stutters that ruined the high-fidelity experience. I tried closing all unnecessary background software, but the frame drops persisted, making me worry my hardware was insufficient. I then used the GamePP Resource Scheduler to force the game process to Realtime priority and fixed virtual memory at 16GB via the tool. RTSS confirmed frame times converged from 16.4-28.2ms to 11.2-13.5ms, while HWMonitor showed memory temps stable at 42-48℃ and AIDA64 measured usage at 13.1-14.8GB.