Why is my CPU temp jumping in Kuro no Kiseki exploration?

While wandering the streets of Crossbell, I heard a slight resonance from the chassis and saw CPU temperatures jumping randomly between 70℃ and 85℃ per AIDA64. I first tried increasing fan speeds to 2000 RPM per HWInfo64 to compensate, but the core temperature stayed stuck at 82℃, leaving me feeling defeated by this superficial fix. I accessed the GamePP Hardware Sensor Page to monitor the pump curve and manually raised the voltage from 1.1V to 1.25V in BIOS. Core temperatures stabilized at 65-72℃ per AIDA64 and pump speed locked at 3000 RPM per GamePP.