How do I fix voltage fluctuation causing frame drops in Kingdom Come: Deliverance II?

Landing in parkour scenes caused 60-45 FPS drops due to 0.05V voltage fluctuations per OCCT. I tried lowering graphics, but the visual loss was painful. I then used GamePP Power Plan Switcher to enable High Performance and lock CPU voltage. Frame time converged from 16-22ms to 14-16ms via GamePP Analyzer. Temperature settled at 72-78℃, and the system felt perfectly stable.