Im using 275 frequency @ .745v for testing which is broken in the firmware (you cant set it in the dropdown menu it comes up as 2,275MHz) 
The closest you will get in dropdown is 268.75 which is 1085GH/s ...bitmain really needs to update the firmware for these but they do a great job for heating with minimal noise
The closest you will get in dropdown is 268.75 which is 1085GH/s ...bitmain really needs to update the firmware for these but they do a great job for heating with minimal noise
You are stable with this overclock. What did you do to your miner? Did you change the thermal paste or something?