How can I stop frame rate jitter during dungeon clears in Black Desert?

Dungeon runs were ruined by stuttering just when I needed to dodge. I tried manual CPU overclocking, but it blue-screened and wiped my progress. I switched to the GamePP Power Plan Switcher to force High Performance mode and locked the minimum core count. Cinebench showed stable 5.2-5.4GHz frequencies. In-game, frame rate stabilized from 75 to 95 FPS, making controls responsive and smooth.