and then there was 3.  So I noticed 1 of the 4 remaining singles was constantly running at 700mh/s with 45-46c temps.  I go to take a look to see if the front is blinking and the front led is no longer lit.  Great.  I go to move it to another pc too see what is going on and I hear a very slight tink, as I move it I see a very tiny led fall out.  So far went from happy to a little annoyed and now to kind of pissed.  I already had to pay to ship 1 single back, and I am guessing soon I will be paying for another.