You use miner at very high intensity for GTX1080 card (25), try to decrease it to 21-22. I use 21.5 and get about 36-37 Mh/s per GTX1080 card at 80% tdp
Every time I decrease the intensity my hash rate drops, ill have to fiddle with it more now that I know the mem trick. I'm still relatively new to mining, I just picked Sigt because it was new and this thread continued to blow up.
