I've tried Resident Evil 1,2 and 3 using Retroach - along with the correct BIOS files ofcourse and it smooth like butter. No stutter, framedrops, anything unplayble at all. Well at least from what I tested from those 3 PSX games.From what I've had, not a lot of N64 games (Bomberman 64, Banjo Kazooie, etc.) run smoothly or even at all. I also forgot to mention PS1.