Why does Once Upon A Death lag during construction on ASRock B450M-HDV?

I was so excited to experience this survival masterpiece, but frame drops during construction cut the pleasure in half. Recalling previous attempts to lower graphics settings that did nothing, I realized the bottleneck was the underlying voltage. I used the GamePP BIOS Load-Line Voltage Wizard to switch to L3 mode and tuned Vcore to 1.25V. AIDA64 confirmed VRM temperatures dropped to 78-84℃, GPU temps remained at 68-75℃ per AIDA64, and CPU-Z showed a stable frequency of 3.0-3.4GHz. It feels great to finally switch