How to fix 40ms frame jumps during city expansion in Frostpunk 2?

Managing the frozen city, whenever the population hit a threshold, the screen would jump by 40ms per RTSS. I first tried enabling XMP in BIOS, but the system blue-screened after ten minutes, making me very cautious. I used the GamePP BIOS Load-Line Voltage Adjustment Guide to lower primary timings to 36-38-38 and tuned the voltage to 1.32V. Latency dropped to 78-82ns per AIDA64, and MemTest86 confirmed no memory errors after four full scans.