this seems odd to me, running on default settings and lpm off:
voltage and frequency seem off:8.9V and 650MHZ (when should be 630MHZ), temperatures are high
and also, the hash rate on overclock doesn't get reported pool-side to be like the S9 reports it
https://imgur.com/a/pxkRpggI'd drop those volts, my lord. I can run 800mhz at 8.8v with BARELY any he errors. For those low frequencies I'd drop the volts to 8.4 or 8.5 and then, your heat will drop. Turn lpm on. And you will see the advantages.
You're going to burn up your hashboards with that high volts and low frequencies.