Changes

The first is the virtual FPS. If this is running at 60/60 then the emulator is running at full speed. The second is the real internal FPS, which is whatever the game actually ran at. Older consoels ran at 60 fps Most consoles use the following internal FPS based on region:*NTSC (ntsc anywaysUSA, Japan). With the move to 3D: 60FPS*PAL (Europe, however, it took much Australia): 50FPSNote that in more cpu power to run games at 60fps. So few games actually ran at that. Most ran at 30fpsrecent consoles, and some at 20fpssuch as the GameCube/Wii, or even lower. Zelda Ocarina of Time for instance runs at 20fps. Star Fox ran below thatPAL can also run in 60FPS.

With the move to 3D, however, it took much more CPU power to run games at 60FPS. So few games actually ran at that. Most ran at 30FPS, and some at 20FPS, or even lower. Zelda Ocarina of Time for instance runs at 20FPS. Star Fox ran below that. If you are experiencing slowdown, it may be that the emulation is too intense for your system. When this happens, both the video and the sound experience slowdown. To counter act this, you can enable speed hacks, use a less intensive emulator/settings or get a new CPU. However, the slowdown may be part of the original game, and will be emulated. As such there is nothing that can be really done, short of reprogramming the game itself or emulating an overclock. When this slowdown occurs, the video will slowdown but the audio will often continue at full speed. An example of a game with real slowdown like this is Metal Gear Solid (ps1PS1).==Speedhacks==Using speedhacks can affect '''both''' types of FPS in emulators. Most of the time it only affects the emulator's speed though, to help achieve 60/60FPS. Some speedhacks, however, can lower the internal FPS to raise the emulator's FPS; an example of this is in [[PCSX2]], known as EE cycle stealing, which reduces the clock speed of the virtual CPU used, the Emotion Engine. No speedhacks raise the internal FPS, as this should always be at maximum unless altered as previously mentioned.