How do I stop thermal throttling with the PCCooler RZ500 in Horizon?

I was crossing mechanical beast herds in the Forbidden Zone when my CPU hit 82°C per AIDA64, causing severe stutter. I tried locking the fan at 2000 RPM, but it only pushed temps to 88°C. I realized I needed a better curve. I opened the GamePP Fan Curve Configuration Panel, switched to a linear transition starting at 70°C, and set the minimum RPM to 600. After this adjustment, AIDA64 showed stable temps of 68-72°C and RTSS confirmed smooth frame times. This finally saved my immersion.