There's no reason to test a GeForce GTX 1080 Ti at 1920x1080; at that resolution, even our high-end host processor bottlenecks performance. Rather, these cards are designed for 2560x1440 and up.
At QHD, the GeForce GTX 1080 Ti AMP Extreme is, depending on the game, between 10 and ~12 percent faster than Nvidia's GeForce GTX 1080 Ti Founders Edition or the Titan X (Pascal).
At this high resolution, Zotac's GeForce GTX 1080 Ti AMP Extreme is between nine and 11 percent faster than the GeForce GTX 1080 Ti Founders Edition and Titan X (Pascal) cards.
Many of these titles are playable at 4K. Those that aren't can be made smoother by dialing down the quality settings somewhat.
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