What kind of temps are your dr3 chips running at and at how much wall power?
Mine temps are 88C, 85C, and 83C at 100% fan and my meter is telling me it's pulling 1570W. Miner says it's between 7.8 and 7.9 Th/s.
At least I don't have any chain errors and my HW errors are relatively low (less than 50 after 10min).
what frequencies are available by default?
Can you set a frequency other than the included ones via the browser/inspect or editing /config/cgminer.comf?
If so, I can move on, if not, I want get get the firmware and open it up.
-j