Nvidia could not make Quad SLI work
 

Nvidia was working hard to introduce Tri SLI and our sources have indicated that Nvidia is launching Triple SLI simply because it got far better results than with four cards.

Many enthusiast PC vendors were unhappy before with the performance of two 7950GX2 cards in Quad SLI, as the performance was marginal and they simply expected more from twice the price of a single card.

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