How to fix FPS fluctuations in dense towns with Noctua NH-D15S?

It's ironic that a top-tier cooler let me lag in town; the NH-D15S created airflow turbulence. I tried cranking up case fans, but the noise was deafening and FPS still hovered at 40-55 per RTSS. I used the GamePP Memory Controller Load Monitor to find L3 cache drops, then used the Process Priority Manager to lock game threads to P-cores. Cinebench scores rose from 21000 to 23500, FPS stabilized at 52-58 per RTSS, and local hotspots dropped from 88℃ to 65-72℃ per AIDA64.