yes for nvidia its called SLI and fot ATI its called Crossfire, it links the two gpu's together and gives u a mojor increase in graphix processing
but your motherboard must support it with 2 PCI-e slots
i dont think the quad sli has come out yet... it was at a computer show, but thats it, and even if you can get it, the rest of the crappy dell system will bottleneck it!!!LOL
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