I know there are a few boards out there that are capable of hybred 2 gpu solutions onboard gfx running with a card but I don't even recall if its ATI or Nvidia does lol Its not something I would ever consider trying.
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http://www.nvidia.com/object/hybridsli_notebook.html
http://www.nvnews.net/articles/hybri...ew/index.shtml
Nvidia do do it. However I can't even spell hybrid lol lol