i get 402kh/s on my 1080 Ti with i7-4790k (20% load)
i also would like to get some coins on Trade Satoshi but that crap exchange seems to be down all the time

With the bat file, set your lookup-gap=2
should look similar to this:
ccminer-x64 --algo=scrypt:10 --lookup-gap=2 -o ***** -u GYQ1CEvfXXa2nQX8Uu61XUxZfkpxmNJUsZ -listen --max-temp=85
pause
I'm getting almost 600kh