How to fix micro-stuttering and frame jitter in Victoria 3?

While piloting the mech in a high-speed dive, I noticed a distinct micro-stutter that ruined the precision. I tried updating the GPU driver to the latest version, but the stuttering remained and I even got slight screen flickering, which felt helpless. I used the GamePP Peripheral Driver Conflict Detection Tool to find an I/O conflict with a controller driver and set its service to manual. Frame generation time converged to 14-18ms per RTSS monitoring and core temperature stabilized at 62-68℃ per AIDA64.