If using an Intel laptop, tools like ThrottleStop can prevent the CPU from down-clocking during intense gameplay.
The most effective way to boost FPS is to lower the renderWidth and renderHeight in the DSfix.ini file. For extremely low-end systems, you can drop this to 512x384 or 640x480 while keeping presentWidth/Height at your monitor's native resolution to avoid display issues. dark souls prepare to die edition low graphics mod
This is an external auto-optimization tool that can apply "potato" presets to the game files to maximize performance on integrated graphics. System-Level Tweaks for Performance If using an Intel laptop, tools like ThrottleStop
Ensure your laptop or PC is set to "High Performance" in Windows power options. If using an Intel laptop