It is hardware related. If your graphics card is not designed for, selecting triple buffering may crash your system. Under certain circumstances triple buffering reduces choppiness, but it increases memory requirement.
(the following info is taken from
http://www.matrox.com/mga/products/tech ... ary_3d.cfm)
Triple buffering
Triple buffering is a technique of dividing the frame buffer into three areas: two drawing buffers and one display buffer. This allows the application to display a frame of animation from one buffer while drawing the next frame into the other buffer and then start rendering in the third buffer while the other two buffering are still in use, therefore further increasing performance.