In my opinion, the Libretro PPSSPP core is ineffective on the RG351P - I’ve never seen a game that runs better on this core than on any of the other standalone emulators. For example, the stock firmware has a standalone version of PPSSPP as well as a Libretro/RetroArch PPSSPP core the latter is also shared with ArkOS and 351ELEC. Of the four available firmwares, there are some overlaps. Comparison of available emulation options for the RG351 firmwares This is especially true with racing games the first lap will have some hiccups, but subsequent laps might be significantly better. I recommend you continue playing the game to see if conditions improve. The PPSSPP emulator caches its data, and so because of that your first few minutes with any game will likely have a bit of lag and stutter. In general, stick with 2D games, platformers, role-playing games, puzzle games, and racing games. But there are many games that just don’t fare well. I would say that 50% of PSP play comfortably well, and 25% are pretty impressive.

It simply requires more horsepower to play these games well. When attempting to emulate PSP on the RG351 devices, you must keep in mind that the RK3326 chipset just doesn’t do PSP emulator very well.

Vita retroarch ppsspp core