Why does Frostpunk 2 crash when my population exceeds 10,000?

Planning the power grid in the freezing city was devastating when the game crashed without warning as the population grew. I tried disabling XMP in BIOS to run at default speeds; while it stopped the crashes, the calculation speed slowed down, making turn transitions laggy. I used the GamePP BIOS Load-Line Voltage Adjustment Wizard to lower timings to 32-36-36-72 and increased voltage to 1.4V per HWInfo. Latency stabilized at 68-74ns per AIDA64, and MemTest86 confirmed zero errors over 6 scans.