07-12-2011, 08:30 PM
Problem can be anything, starting with emulator itself. Maybe the game you want to play isn't supported. While some games run at full speed, some at half, some has really low fps, and there are games that doesn't load at all. Then there is your computer. I don't think buying a graphic card would resulting in a big FPS boost. Emulators (and especially JPCSP since it is written in JAVA, a really demanding programming language) tend to relying on RAM and CPU more than VGA.