My 1070Ti hash with 31Mh/s with --mt 4.
Disable force P2 state with nvidia inspector, and coreclock at 1900. memclock at 4500, (micron memory)
Disabled P2 state, but my memory only clocks to +425 for 3800Mhz. After that it becomes unstable. Hashrate still 30-31Mh/s.