I just tried to OC two of the ones that came this morning, and both died after the reboot.

Putty connected OK
Changed values in asic-freq as usual
reboot via web interface.
Units reboots and starts beeping.

Cannot connect via web or putty, had to hold reset button and restart unit to default ip.  Hope I can get it up and running

I have many others that worked fine,  I think the Firmware may be different !!!!