I want to report in on my findings, running a pair of S3.
One gets consistent 430GH over 1 day, 6 hours. Default clock speed
The other one gets consistent 410 GH over 1 day, 6 hours. Default clock speed
I've rebooted the slower one several times, and all chips show OK status. They are on independent power supplies. Only one miner per 700W power supply.
Only upside is temperature is consistently below 40.
did you try to ssh into it and change to 212.5 (as philipma did)?
(comment on 218.75 with # and uncomment 212.5)
Good tip. I will try that.
I also notice there is a lot of discarded shares. And 225 and 218.75 frequencies all have the same time out values. I wonder if setting lower time out values with higher frequencies will help reducing discarded shares.