Overclockers Club published a review on the NVIDIA GeForce GTX 1070 Ti Founders Edition
A quote from the article:
Performance wise, the GTX 1070 Ti is going to come close to an average of 10% better than the GTX 1070 and fall a bit short of GTX 1080 performance. This is right where it should fall based on the hardware NVIDIA put under the hood. Overclocking the card just adds to the level of performance you can see when you push it. I found that this card overclocked right into the same envelope as the GTX 1070 FE card I have, so you see some consistency in the core and memory clock speeds the Pascal cards can reach. Boost clock speeds of between 2050MHz and 2062MHz are the range this particular card runs at, while the memory reaches right at 2260MHz. As we have seen in the past, the Pascal cards feature a factory boost clock speed that is well in excess of the factory stock speeds when the card is running under the thermal and power limits set by NVIDIA.NVIDIA GeForce GTX 1070 Ti Founders Edition Review @ OCC