You are pushing those cards too hard with the overclocks, most cards don't run with clocks too high.

I get over 510 sols on my EVGA 1070 Ti with these settings below with the temp at 70c using the zm miner.

Set the memory to -303 and the core to +140 and power to 85 - 90.

Lower your overclocks and keep the fans above 90% to keep them cool.