I installed CUDA toolkit 7.5 on my ubuntu 16.04(nvOC 0018) box and it worked, thanks palgin! Since CentOS version uses CUDA 8.0, I'd suggest upgrade to CUDA 8.0 for ubuntu in next release.
BTW, do you take dev fee? If not, I think 1~2% is fine.

my hashrates:
1060  6G  16
1070  27.3
1080ti 44.6