http://www.pcgamer.com/geforce-gtx-1070-ti-officially-coming-november-2/

Today, Nvidia officially reveled the specs and pricing for its upcoming GTX 1070 Ti graphics card. As we discussed earlier, the card is a beefed-up alternative to the GTX 1070 that ends up landing very close to GTX 1080. It fills the relatively small gap between the GTX 1080 and GTX 1070, offering a high level of performance for a slightly lower price. How much with the cards cost? All we have right now is pre-order Founders Edition pricing, which is $449, so $50 less than the GTX 1080. That's the same as the previous price on the GTX 1070 FE, which has since dropped to an official MSRP of $399.

The key difference is that where the 1080 enables the full GP104 chip, the GTX 1070 Ti disables one SMM cluster of 128 cores. That gives it 2432 CUDA cores compared to the 1080's 2560 cores. The GTX 1070 had five SMMs turned off and only 1920 cores, so this is a significant step up in performance. Another difference is that the GTX 1070 Ti (and 1070) uses standard GDDR5 running at 8Gbps, while GTX 1080 cards use GDDR5X—the initial cards ran the memory at 10Gbps, and later models support 11Gbps. The 1070 Ti does raise the board TDP to 180W, matching the 1080's TDP, which isn't suprising considering the other specs.