Why does my Valkyrie V360 MIST pump drop speed in Genshin Impact?

I saw my pump speed drop to 800 RPM, pushing CPU temps to 85℃ and worrying about leaks. I tried expanding the page file to 32GB, which didn't help the heat and actually reduced FPS to 45. Using GamePP Fan Curve Configuration, I forced the pump to 1500 RPM and set the thermal threshold to 75℃. AIDA64 verified temps stayed between 72-76℃, and HWiNFO confirmed stable pump speeds. This method is crucial to set your cooling safely.