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https://devtalk.nvidia.com/default/topic/367747/cuda-programming-and-performance/sli-use-with-cuda-programming-general-cuda-programming/
That's rather old thread, but the main point is still valid: CUDA practically has nothing to do with SLI. On the other side, depending on what you are intending to do, there were some improvements with recent toolkit releases in handling multiple GPUs - for example, CUDA 4.0 introduced so-called Uniform Virtual Addressing, that makes it possible for one GPU to access memory attached to other GPU, without going through main memory for this purpose, which is sort of a step in the direction of NUMA-like architecture.
No, in general you don't want to use SLI if you plan on using the GPUs for compute instead of pure graphics applications. You will be able to access both GPUs as discrete devices from within your CUDA program. Note that you will need to explicitly divide work between the GPUs.
SLI adds more horse power with additional GPUs but the app needs to be written to utilize them.
Currently programs have to be written to take advantage of multiple CUDA devices, SLI doesn't expose more CUDA cores as a single logical device. Same goes for OpenCL.




? Und Witcher 3? ... rüste liebe alle 2-3 Jahre mal wieder etwas auf Wir verwenden essentielle Cookies, damit diese Website funktioniert, und optionale Cookies, um den Komfort bei der Nutzung zu verbessern.
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