Like I said in the opening, I don’t really talk too much about the results. Not to mention, beyond jumping up to a pair of Titan XP’s, this is as good as it gets currently. So it's no surprise that in most of the tests the GTX 1080’s in SLI top the charts. In fact, in a few cases, they completely ruined the charts, making all of the 1080p focused cards hardly show up in the graphs. It also forced me to split up the 3DMark and Catzilla benches as well. That said SLI performance is highly dependent on having SLI support for the game that you are trying to play. I did include all the unsupported game results as well and if you look close you will notice that some of them even perform worse than a single GTX 1080. Something to keep in mind when considering going SLI.
Synthetic Benchmark Without SLI Support
In Game Benchmarks with SLI Support
In Game Benchmarks Without SLI Support