Manor Lords is stuttering during city builds with my NH-D15 G2. Can I fix this with process priority?

This cooler is ridiculously powerful, but it's so good that it actually confused my motherboard's scheduling. During heavy building phases, the clock speed was jumping around like crazy. Because the NH-D15 G2 keeps the CPU so chilly, the auto-voltage mechanism was constantly flipping between low and high states, creating these micro-second delays. I tried 'Ultimate Performance' mode in Windows, but it just added 200 RPM to the fans without fixing the stutters—it felt like trying to catch water with a sieve. I went into the BIOS, changed the PWM step value from 5% down to 2%, and disabled C-States. Looking at the RTSS frametime graph, the jagged spikes turned into a flat line. There was a weird hitch when the fans started up after the change, but adjusting the start voltage to 1.2V smoothed it out. Temps are now a frosty 52-60°C. I exported the performance logs, and the frequency jumps are gone.