requirements - How much extra power is required for a stereoscopic 3D game?

If we use Cryengine 3 for game development and make the game 3D compatible. Because 3D sends out two pictures, will this mean that you need a computer with twice the "power"? So if you get 30 fps when playing normal you will need 60 fps for playing with 3D?

Answer

In short, yes you will need to be outputting 60fps to have the effect of 30fps.