Nvidia has high hopes for Hybrid SLI
 

It is a combination of IGP graphic and discrete graphic rendering together. The principle is rather simple. You take a graphics card, lets say an 8400 or an 8600 and plug it into the integrated graphic board and when you start playing 3D game the graphics card starts rendering together with the integrated graphics and ends up faster than the graphcis cards itself.

http://www.fudzilla.com/index.php?op...89&Ite mid=34