I just wanted to clarify a misconception that many people have. When people talk about the top screen of the Nintendo 3ds, they seem to assume that when the 3d is turned on that the fps (frames per second) split, equating 30 fps for each eye. This is not the case as the 3d depth slide manipulates the screen itself instead of the hardware powering the screen. Sharp (the manufacturer supplying the screens) uses a technology which, when you use the depth slider, only manipulates the liquid crystals in the display to render the 3d effect. This is rather ingenious as this does not use a lot of processing power and only a small amount of battery power. Therefore the Nintendo 3ds is ALWAYS RUNNING 60 FPS. I just had to let everyone know...
Here is a visual representation for my explanation...