So the network connection was the issue, hardwiring off the powerline extension has solved it and I'm currently running at 30 minutes without a failure. Thanks!

Can someone give me help on the PSU situation? I would prefer to get all three hashboards working but not sure that is an option off of a single 110V US outlet.

I have considered getting a apw7 unit, but I cannot determine if that would fix the issue or not, I currently think not.  Is there any option to running the third board off of a second PSU from another outlet? I'm not finding much instruction online about this so would appreciate if anyone could chime in.