Why does The First Descendant stutter during ultimate skills on RX 9070 XT?

During a dungeon showdown, I felt pure panic as my frame rate plummeted from 140 to 22 FPS per RTSS. I tried updating to the latest Beta driver, but that just caused the game to crash at the launch screen, which only added to my anxiety. I finally used the GamePP Peripheral Driver Conflict Detection tool to identify and disable a legacy sync service hogging I/O resources. The result was instant: GPU load dropped to 82-88% per GPU-Z, and frame generation time stabilized at 7-11ms per RTSS, while temps stayed at 62-67℃ per HWMonitor.