Would you point me to the right direction to get nVidia miner?
The probem is finding the nVidia miner that produces the proper hashrate is almost impossible. I have spent over a month and played around with 5 or 6 miners and can never get more than 70% of what others get on my GTX 1070 (I only get 714 while most coin calculators claim i should get 1100)
You may want to try ccminer-alexis-1.0 with the -i 16.5 argument. I hear it is supposed to get good hash rates on the 1070 and 1070 Ti with that setting.
You can find a copy of it here: http://cryptomining-blog.com/tag/ccminer-alexis-1-0/
I'm also inclined to agree with Nitrobg on the possibility of a hardware issue if you can't get a better hash rate. Another thing to keep in mind is that your graphics card may simply be slower. Not all graphics cards are equal.
You could attempt to get a replacement for your graphics card through RMA, just to be sure that there is nothing wrong. I'm not sure it would be worth the lost profit, though.
