NVIDIA's high-end GeForce 9800 GX2 graphics card has been pretty well received on its own, but it looks to be decidedly more of a mixed bag when it comes to a Quad SLI configuration, at least according to a pair of early reviews.

ENGADGET: NVIDIA's 9800 GX2-based Quad SLI solution gets mixed reviews

Just hours after our review round-up of the new GeForce GTX 680 graphics card yesterday, a Dutch site has managed to test multiple cards in different (but invariably exorbitant) SLI modes.

ENGADGET: NVIDIA's GTX 680 tested in SLI and multi-display modes, loses some of its lead

Per Digital Storm's adorable little Bolt PC, a single Titan GPU is replacing the GTX 680 as the most powerful GPU offered, while Origin is offering a variety of setups featuring the Titan (all the way up to four Titans working together in an SLI configuration).

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