Nvidia's Hybrid SLI technology
 

On the whole then, I’m quite excited by the prospects of Hybrid SLI but I can’t help but feel that there are some things that Nvidia could have improved in hardware—and I’m not even considering software at this point because it’s early days—to make the technology that bit more appealing. The real kicker for me is the display support on the nForce 700a series motherboards because, from everything I’ve seen so far, there is only one digital output available.

http://www.bit-tech.net/hardware/200..._sli_preview/1