The only benefits would be for CUDA computation. The reason that games get a boost from 4 way SLI is because the drivers made by Nvidia support it. You wouldn't be able to use an arrangement like this for playing games, because drivers wouldn't support it. There would be no way to use this for gaming because it would only use one of the cards to run the game, there wouldn't be any FPS boost for running the game on this versus a single card. The reason they did this was to use the CUDA cores of the cards, which is supported by the drivers. This is not SLI, this is just multiple cards.
Also, you double posted, so I removed the duplicate post.