SLI/CF is a huge hack - only allows true fullscreen, does weird tricks to render on both GPUs, occasionally gets glitchy results and far more crashes. You do no

SLI/CF is a huge hack - only allows true fullscreen, does weird tricks to render on both GPUs, occasionally gets glitchy results and far more crashes. You do not want to use SLI unless you have no other option. 4k@60 gaming on a single card is an excellent goal. I'm running a single 1080 for this purpose at the moment and on many games it struggles and I have to reduce options significantly. The 1080Ti should be performant enough to run 4k@60FPS on most games on a single card. The 1080 was close, running ~45-50 FPS, but this should push it over that edge. Then there are the people who want 4k@144 and stuff who'll be running 2 of these in no time and still not getting the numbers they want... Hopefully within a few iterations 4k@60 will get down to an affordable level. I just really want to go back to buying $300-500 cards instead of $1k cards and this means we're on the way.