I run 1975mhz on the boost clock and 9808mhz on the memory clock but only on new games like DOOM, and Mafia 3. With +50 on voltage and power target at 116%. No crashes. Fan has to run at 70% to keep temps at 62-65 or it will crash at higher temps like 72-75.
But on older games like shadow of mordor and batman origins i seem to get more crashes randomly in game play. So i back it down to 1935mhz BC and 9508mhz on MC with other setting the same as above.
My advice to you is raise your power target to the max 116% to allow GPU to pull that power extra power if needed. try 50 on voltage and increase fan speed if u haven't tried this already.
i5 6500 NO/OC
GTX 1060 Dual 3GB