This is the most common home for UncapFPS.asi. Many PS2 games were hard-coded to run at 50Hz (PAL) or 60Hz (NTSC), but internally rendered at 30 FPS or lower. When using the PCSX2 emulator, users can employ the UncapFPS.asi script (loaded via the emulator's plugin system) to force the internal FPS limiter off. This allows games like Kingdom Hearts , Final Fantasy X , or Grand Theft Auto: San Andreas to run at higher frame rates, providing a smoother experience than was ever possible on original hardware.
The majority of games that require this tool are ports from consoles like the PlayStation 2, PlayStation 3, or early Xbox eras. Developers optimized games for specific hardware specs. Capping the frame rate ensured a consistent visual experience on a television and prevented the console from overheating or crashing due to computational load.