How to fix GPU fan speed fluctuations in Ground Control 2?

While exploring quiet corridors, the GPU fan would suddenly emit a sharp acceleration sound and then quickly slow down—this frequent jumping was absolutely maddening. I first tried the 'Silent' mode in the driver panel, but during high-load combat, temperatures spiked to 82℃ per AIDA64 and caused throttling, which was completely unacceptable. I then used the GamePP Fan Curve Configuration Panel to lock the speed at 1300 RPM below 55℃ and set a 4-second hysteresis. RTSS confirmed frame rates remained at 110-120 FPS, and HWInfo64 showed VRAM temperatures stable at 42-48℃, which I can now backup