Whatever Tytanick changed, it made smOS more finicky with respect to GPU memory overlcocking.

I was able to get the "one card to 0 mh/s then crash" issue to subside by significantly backing off my memory OC setting (125 MHz), but that results in a net decrease in hashing rate per rig of 4+ mh/s. Before this issue arose a day or two ago, I ran the more aggressive memory OC setting for months without an issue.