Windows 10 Nvidia to end mainstream support for 3-4 SLI systems

kemical

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The release of the new Pascal based cards will see the end of mainstream support for 3 or 4 way SLI. Nvidia will still include profiles for benchmarking using more than two cards but that will be about it:

"With the GeForce 10-series we’re investing heavily in 2-way SLI with our new High Bandwidth bridge (which doubles the SLI bandwidth for faster, smoother gaming at ultra-high resolutions and refresh rates) and NVIDIA Game Ready Driver SLI profiles. To ensure the best possible gaming experience on our GeForce 10-series GPUs, we’re focusing our efforts on 2-way SLI only and will continue to include 2-way SLI profiles in our Game Ready Drivers.

DX12 and NVIDIA VR Works SLI technology also allows developers to directly implement and control multi-GPU support within their games. If a developer chooses to use these technologies then their game will not need SLI profiles. Some developers may also decide to support more than 2 GPUs in their games. We continue to work with all developers creating games and VR applications that take advantage of 2 or more GPUs to make sure they’ll work great on GeForce 10-series GPUs. For our overclocking community, our Game Ready Drivers will also include SLI profiles for 3- and 4-way configurations for specific OC applications only, including Fire Strike, Unigine and Catzilla.,"
Nvidia drops 3 and 4-way SLI mode starting with GeForce 1000 series
 
The above might not be the actual end of the story. Microsoft have stepped in and have made changes to DX12 so that it's easier to implement:

''The cunning plan is to tart it up with a new abstraction layer that will help developers implement support without heavy coding.''

Although still unavailable the toolset will be released soon:

Most DirectX 12 games do not support Multi-GPU configurations because it requires a shedload of programming. Some games where it was done well have shown that DirectX 12 can handle multiple GPUs. They even managed to connect non-matching GPUs like the R9 Fury X and the GTX 980Ti to be used together.

According to OC3D the new abstraction layer is not available yet but Microsoft does state that they will be making a public release of this new toolset soon.
Reference
 
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