I obviously don’t post often, but I’m hoping my own frustration and success may help others.

I ordered several A3’s that arrived this morning - no problem. Connected to Siamining - no problem. Mined nearly all day - great. Around 3 hours ago, 1 of the asics kept crashing with xxxx on all hash boards. I rebooted it and it was good for 30 mins and it crashed again. Now I’m getting a little nervous and irritated, but only 1 unit is doing this. I check it out a little more and note the temps on the pcb and chip are far higher on this unit than the rest. I have no idea why - same batch, firmware, pool, everything. I reboot a couple more times with it crashing after 30 mins before I have to do something. The chip temp keeps hitting 107 while the other asics are hovering around 94.

Good or bad, to solve the problem, I lowered the frequency from 600 to 500 and voila, the temps are now in the same range as the rest of the A3’s at full frequency. I’m only pulling 680-700 instead of 815, but at least my unit won’t crash every 30 mins now... thanks Bitmain.