Why does my system crash during Expeditions Rome battle settlements?

In this tactical game, any cooling fluctuation is a disaster; my CPU would spike from 60℃ to 100℃ in a second, causing total system shutdowns. I tried setting the pump to full speed in BIOS, but the high-frequency whine was unbearable. I used the GamePP Fan Curve Configuration to create a non-linear binding, enabling burst mode at 70℃. HWInfo64 confirmed the temperature range converged to 65-78℃, and AIDA64 showed the GPU stayed stable at 62-68℃, finally ending the crashes.