I want to clarify when I say the Pi is 'crashing'  I mean that the GUI locks up, mining stops and I get the message from the pictures above when trying to log into the Pi over the web GUI.  For all intents and purposes the Pi looks like it is still running but only a hard reboot will get me back in.  The things stop mining every like 6 hours at this point and I am baffled as to what could cause this.  Some of them also seem to stop mining at the exact same time and I cannot figure out why that would happen either.  They aren't linked to each other in any way.