stuttering i5 14400f

"My PC specs are i5-14400F, RTX 5070, and 32GB DDR4 RAM, but I'm experiencing stuttering while playing this game. Please help me fix it." "The FPS is inconsistent. When I first launch the game, it runs at 240 FPS. But if I restart the game, the FPS drops to around 220 and never goes back up to 240."