GTX 1080 Ti SLI performance: per game
There are great differences between how much performance boost SLI provides per game. Some games do not support SLI at all, while others show a marked improvement. Here you can see the performance boost each game showed in Ultra HD Ultra.
|GTX 1080 Ti||GTX 1080 Ti SLI||Gain|
|GTA V - 3840x2160 - Very High||38||59,1||55,5%|
|Project Cars - 3840x2160 - Ultra - MSAA||124,7||193,9||55,5%|
|F1 2015 - 3840x2160 - Ultra||74,9||70||-6,5%|
|Rainbow Six Siege - 3840x2160 - Ultra||41,9||40,2||-4,1%|
|Far Cry Primal - 3840x2160 - Ultra||56||70||25,0%|
|The Division - 3840x2160 - Ultra||53,9||78,6||45,8%|
|Rise of the Tomb Raider (DX12) - 3840x2160 - Ultra||58,2||111,8||92,1%|
|Battlefield 1 (DX12) - 3840x2160 - Ultra||65,2||61,8||-5,2%|
|Watch Dogs 2 - 3840x2160 - Ultra||44,7||73||63,3%|
|Doom (Vulkan) - 3840x2160 - Ultra||111,1||100,7||-9,4%|
|Civilization VI (DX12) - 3840x2160 - Ultra||79,2||77,4||-2,3%|
Some of these games, like Battlefield 1, support SLI in DirectX 11, but can't use DirectX 11's new Explicit Multi-GPU feature. The only game that does support Explicit Multi-GPU is Rise of the Tomb Raider, and it shows an enormous gain of 92%. While we have earlier seen similar percentages with slower cards, the gain is usually smaller with faster cards. This is a good portend, at least if developers take the time to program for Explicit Multi-GPU. The other games that support SLI show a boost of around 50%, except for Far Cry Primal, which shows an improvement of 25%.