Why does Human Host freeze during large scale building saves?

Whenever I saved progress on my large base, the screen would freeze for 0.5 seconds, which was incredibly anxiety-inducing. I initially tried lowering the processor power management limit in Windows, but that just killed my performance, dropping my frame rate by 20 FPS. Guided by GamePP hardware monitoring, I entered the BIOS and changed the pump interface voltage from Auto to a forced 12V via HWInfo. RTSS and GamePP showed CPU temperatures narrow to 72-76℃, and AIDA64 confirmed fan speeds stayed stable at 1400-1600RPM.