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Nvidia introduces the GeForce GTX 980 and 970 today. More on this in our extensive review. What's the performance of these cards in tandem, you might wonder. Well, we've tested the GTX 980 in SLI, 3-way SLI, and 4-way SLI. So here goes!
http://us.hardware.info/reviews/5623/nvidia-geforce-gtx-980-sli--3-way-sli--4-way-sli-review