It hasn't worked well in any incarnation, going back to 780G and GF8300. For that matter, CF and SLI have been problematic since 2005 and people still buy into that too. And actually even Voodoo2 SLI had some problems with scanline artifacts and vsync. It is a bit of a mystery as to why people buy into it over and over. It's not entirely stupidity or ignorance. Andrew's "wanting to believe" sounds like a good explanation. Faith fueled by PR speak.