I am also interest in your setting for NVIDIA. Currrently I am having 670 H/s per card on GeForce GTX 1070 Ti

Here is my setting.

 // gpu: GeForce GTX 1070 Ti architecture: 61
  //      memory: 6761/8192 MiB
  //      smx: 19
  { "index" : 0,
    "threads" : 22, "blocks" : 57,
    "bfactor" : 8, "bsleep" :  100,
    "affine_to_cpu" : false, "sync_mode" : 3,
    "mem_mode" : 1,

Would appreciate some tips / adjustments

Thanks