I didn't know about intensity settings, but there is something weird, 1060 6gb cards see about 0.5mh/s speedup after setting -x 20, but 1070s are losing 2mh/s each on -x 20, what's happening ?
Because the different sm counts on the gpu's. I didn't set defaults for the 1060 6gb.
does -x 40 work on the 1080ti?
I don't own any 1080tis, from quick testing it looks like this for me:
1060 6gb - good bump in speed with -x 20, going 40 doesn't improve performance further
1070 - changing anything from default causes hashrate drop
1080 - no change regardless of intensity settings