Nvidia's new top of the line GPU arrived with quite a bang. The GeForce GTX 1080 allows for no-compromise 4K gaming on a single GPU. In our full review we found that even with the eye candy turned all the way up it was possible to achieve playable performance in all the latest titles. And yet in spite of this, that didn't mean it was able to hit 60 fps at all times. Hitting that lofty target requires more than any single card on the market can deliver. The solution? Two GTX 1080s, of course. In this article, we're taking a close look at the GTX 1080's dual-card SLI performance at 4K resolution to see exactly how much more graphics-crunching horsepower that second GPU brings to the table. Read the complete article.