RPCS3 Games are stuttering when LaunchBox and BigBox.

Hi! I'm also using LaunchBox for long time, with lots of different emulators. RPCS3 will "stutter" only then, when your hardware does not fit the recommended requirements. With 16 GB RAM and a 4 core + 8 threads CPU over 3,9 GHz you can use RPCS3 with many other applications at same time (i.e. LaunchBox - which is launching RPCS3 for your PS3 games ...).

But it also depends on the game itself. If a game is not (yet) working well with RPCS3, then of course you will have something more than "stuttering" (lags, crashes, frame drops, and so on) ... :-)

I advise you to check in the RPCS3 Compatibilty for your game:
https://rpcs3.net/compatibility