Why does Civilization VII tear on Maxsun MS-Terminator B850M?

Expanding my territory was a pain; annoying tearing lines appeared at the screen edges, destroying my strategic focus. I first tried enabling V-Sync in-game, but while tearing stopped, input lag became unbearable. I switched to the GamePP Power Plan Switcher to force High Performance mode and disable core parking. This suppressed frequency fluctuation to within ±100 MHz per HWInfo. Memory usage stayed at 15.5-17.2 GB per GamePP, and temps hit 65-71℃ per Sensor, making the frame curve a perfect line.