On the one test unit, I will now try 250/0750, hardware reset then software reset. Will see what happens! One thing I am wondering is if we are triggering an internal chip overheat of some kind, that throttles it back but doesn't report a bunch of failures. So we try to push them harder, and they actually go slower. But I'm just guessing at this point.
Its your rig, but I'd try 275/0800 first. Simply enter the voltage, save and apply then do a power cycle.
On pushing them harder if they are going to throttle back without showing any outward sign ..... that is the question.
Sorry, missed this post. I will try 275/0800 after we see what happens with 250/0750. My procedure lately is to put in freq/volt, save & apply, power cycle, then system/reboot. I added on the last step after just a power cycle would result in bad stats in Miner Status. Have you tried OC on an S3+ with factory thermal paste? The six I am working with are untouched. So if it is a chip-level thermal problem that is not reported to the sw, then I guess that could explain the difference here.