Ok, thank you. I always had good settings but i was confused that it dropped from 95 to 20-25 with n-factor increase. I thought with n-factor increase i would get exactly the half hashrate, so i expected about 40-50 for R9 270, but that seems impossible.
Yeah, n-factor isn't propotional to hashrate. Whan n-factor increases on May the hashrate on GPU will be even lower and we will see more CPU miners. This is good for network security.