GTX 1080 Ti SLI performance
How much performance do you gain when using two GTX 1080 Ti cards in SLI? We have seen that there is generally some performance boost, but that it differs per resolution. Here you can see the average gain in the ten games we have tested.
|GTX 1080 Ti||GTX 1080 Ti SLI||Improvement|
|Full HD Medium||191,1||173,7||-9,1%|
|Full HD Ultra||131||140,5||7,3%|
|Ultra HD Medium||109,4||121,8||11,3%|
|Ultra HD Ultra||67,3||86,3||28,8%|
In Full HD and WQHD Medium bottlenecks prevent a performance gain, while the increased overhead of SLI means a decreased performance. Even in Full HD Ultra, WQHD Ultra and Ultra HD Medium, the performance gain is limited. The only scenario where SLI is really interesting (considering the price) is if you want to play taxing games in Ultra HD Ultra. The 28.8% performance gain means a lot, and it gets you 60+ fps in nearly all games.
The next step is gaming on 4K with three screens, in other words, 12K. A few small tests show that the GTX 1080 Ti SLI is extremely powerful, even in such settings. In Ghost Recon: Wildlands, you can get 64 fps at High settings and 12K. This new game, by the way, supports the new Gameworks 'Turf' feature (announced at the same time as the GTX 1080 Ti), which Nvidia claims will enable games to render grass more realistically.
You can't play the very highest settings, at least on this game, but this is still impressive given the challenges of 12K gaming. Compare it to a single GTX 1080 Ti, where you can get 'only' 50.9 fps.