Ppsspp Raspberry Pi
Overclocking is less necessary, but ensure your governor is set to "Performance" mode (you can do this through the RetroPie settings or raspi-config ) to ensure the CPU doesn't downclock to save power during gameplay.
The experience varies wildly depending on which model of Raspberry Pi you are using. ppsspp raspberry pi
over_voltage=6 arm_freq=2147 gpu_freq=750 Overclocking is less necessary, but ensure your governor
sudo apt install ppsspp -y