Perhaps, but if anything that link supports the 7970 being a far better option for 4-way xfire/sli anyways. In a lot of cases the single card GTX 680 performed better than the multiple card setup, implying the drivers are the culprit, but still that would be a reason to not buy a multiple card gtx 680 setup right now.
As I said before, if I ever decide I need a top of the line setup, I would only go above 2 cards because of the reduce microstuttering.
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