Alright, I just registered to post here some research I've done. I've published it at my personal page, but I'll mirror it verbatim also here for your convenience. It might explain why many of your devices died, and how to prevent that in the future:
Hello! Thank you so much for this. Impressive work!
SSH is quite useful, I would like to find the log files in order to start collecting data about the mining and hardware.
Do you happen to know how? It keeps sending me to login page even when I test connection using curl, I also tried adding auth= and using the hash obtained by using my own password, to no avail.
Also do you think there’s a way to play with core clock and voltage in these?