Here is the informative text regarding what this setting does, how it impacts performance, and when you should use it.

In the context of PCSX2, a duplicate frame refers to a situation where the emulator renders the same frame multiple times, rather than moving on to the next one. This can occur due to various reasons, such as:

: If you are using "60 FPS patches" on games originally meant for 30 FPS, this setting might conflict with how the patch forces new frames. Troubleshooting "Still Stuttering"

PCSX2 is the premier PlayStation 2 emulator, but even on high-end hardware, users often encounter visual "stutter" or "judder" despite the FPS counter showing a solid 60. This is frequently caused by the way the emulator handles frame presentation. If you are tired of micro-stuttering, learning how to skip presenting duplicate frames is the key to a buttery-smooth experience. Why Duplicate Frames Happen