Hi, i tried your miner, i m using bfminer but only on c29 with w10 and w7, with 3x G1 GTX1070's 8GB.

with bfminer i get 4.4G/s, clocks 100/440/80% using about 125W each on c29.
with gminer i get 4.2G/s, 125W each on c29 with w10 and w7.
c31 did not work on w10, error nog enough memmory, the cards have 6.7gb memory left.
but in w7 i got about 0.31G/s using about 90W.