Although the two leading company of graphical display chips, NVIDIA and ATI, have developed its multi-GPU solution (SLI and CrossFire) for a long time, the use of these technologies are just restricted to its own chipsets only. CrossFire support in Intel P965 and 975X are just the very exceptional cases, and there is no 3rd party chipset are allowed to use these features. It’s not technical issue that makes other company unable to design, but the authorization problem.

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