All the games that really could benefit from it (I.E. poorly optimized ports) don't even support it. Dead Rising 3, Quantum Break... I'm looking at you. These two games won't be able to run at 4K/60 FPS until we get some super futuristic card like GTX 1280 Ti's... And then you just have a slew of new AAA games that aren't necessarily poorly optimized, but the developers can't be arsed to implement SLI anymore. Batman: Arkham Knight, idTech 5 games (DOOM, Rage, Wolfenstein: The New Order & The Old Blood) are examples. No SLI support *at all* in these recent titles and they're not even DirectX 12 games! And then there's the new games that do implement it have shoddy implementations that instead of increasing performance 80-95% like it used to only increase performance by less than 40%. Fallout 4, Far Cry Primal and Assassin's Creed Syndicate are great examples of garbage SLI performance increases. I only got a 10 FPS increase in Syndicate by turning on SLI... It seems like the number of new games supporting the technology and supporting it properly (delivering a 80%+ framerate boost) are extremely rare now. Rise of the Tomb Raider, the Battlefields, Battlefront are the only recent ones that come to mind. EA seems pretty good at supporting it so maybe Mirror's Edge Catalyst will be good for SLI too but they are like the *last one left* so I'm sure EA's good support for SLI will go out the window when they start making DX12 games. The GTX 1080 or GTX 1080 Ti at the very least should be powerful enough by themselves to drive slightly older games without requiring SLI anymore (I.E. pre-2016 releases like GTA V, Dying Light, Metro). SLI used to be needed to do 4K/60 FPS. Not much older stuff is going to be left that is taxing enough that it will need a 1080 or 1080 Ti in SLI to do 4K at 60 FPS all maxed out... Witcher 3 maybe? I think the Maxwell generation is going to be the last where SLI had some usefulness. With lazy developers and DX12 killing SLI support in 90% of new games I don't see the point anymore. I'm selling my 980 Ti's and getting a single 1080 Ti next year because I suspect that by next year you will be able to count on one hand the number of PC games which a) actually support SLI and b) which need SLI to do 4K + 60 FPS and can't achieve that on a 1080 Ti by itself. I used to do a SLI setup always, because it was a well supported technology that yielded a considerable performance improvement in 90% of AAA's, and games that lacked SLI support were a small minority. Now it is the other way around. It is going to be weird running a machine with only one GPU in it, probably for good.