Why does my CPU downclock during Black Desert siege battles?

I was losing my mind in a siege battle as my CPU spiked to 92°C, triggering downclocking. I tried manually locking the fan speed, but it just fluctuated wildly between 1800-2200 RPM per GamePP Hardware Sensor Page. That didn't work. I switched to GamePP Fan Curve Config, setting a linear ramp starting at 50°C and locking the RPM limit to 2000. Now, my CPU temperature stays steady in the 72-76°C range. Cinebench stress tests confirm the new curve is effective and stable.