How to fix FPS fluctuation in Expeditions: Rome on Vastarmor RX 9060 XT?

Combat was ruined by FPS dropping between 60-75. Switching to High Performance alone failed due to background services. I used GamePP Power Switcher to lock the plan and kill interference. FPS stabilized at 80-85, and core temp dropped from 82℃ to 76℃, ensuring smooth, precise combat every time.