The Tech Report had a chance to see what the MSI Twin Frozr VI cooler can do to a GTX 1070, they have just wrapped up a review of the Gaming Z edition of that NVIDIA card.  It comes with a respectable frequency bump when you enable OC mode, 1657 MHz base and 1860 MHz boost.  When they tested it under load the GPU stayed below 70C so there should be room to push the card further.  Check out the full benchmark suite in their full review.

"Nvidia's second Pascal graphics card, the GeForce GTX 1070, aims to set a new bar for graphics performance in the $379-and-up price range. We put MSI's GeForce GTX 1070 Gaming Z card through the wringer to see how a more affordable Pascal card performs."

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