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... [Nvidia] is about to quit chipset business, which automatically means that the company's much-hyped multi-GPU SLI technology is either in danger or re-considered. Moreover, several mainboard makers have already ceased making high-end Nvidia-based mainboards. [They have] ... reportedly decided to quit core-logic business to concentrate on development of graphics processors and following failure to secure license to build and sell chipsets compatible with Intel Corp.'s microprocessors that use Quick-Path Interconnect (QPI) bus.