damn i hope you dont pay your power bill or it's very cheap, 56mh/s is nice but at 120% power limit on a 1080ti your really just throwing away money (and any extra profits) str8 to the powerman :/
I run my Zotac's and gigabytes both about 71% power limit, the zotac does 49.5, the gigabytes 45.  
X5 card rig uses 990 watts only and at 92ish% max hash? yes please!