Well after running for 10.5 hours today I lost a board on my "good" machine. (machine 2 if you reference other posts) I'm running 11/23 and that is the longest ive had it running.
I had it at lowest volt, 456. Fan default.
Just giving a data point. i will flash the new firmware tomorrow and see how it goes.
Good luck everyone.
I should also add that it was board "3" same as machine one that eventually crapped out.. I'm not saying this board is dead like my other one, but I find it interesting that it was board 3 on both.