Enable the PCSX2 overlay ( F9 or in settings). If your game runs at 60fps but the "EE" (Emotion Engine) bar is red (above 95%), your CPU is bottlenecked. In this case, lower your internal resolution, not the frame rate.
Understanding why this is difficult helps you appreciate the patches. In PS2 architecture, game loops were often hard-coded. A developer might write if (frame_count % 2 == 0) process_ai(); expecting a steady 30fps. pcsx2 60fps patch
: Increasing the EE Cycle Rate (overclocking the virtual CPU) in the Emulation settings is often required to provide the extra power needed to hit 60FPS without lagging. Essential Performance Settings Enable the PCSX2 overlay ( F9 or in settings)