I went upstairs for lunch and came down and the system had crashed, again. The cpu temps were pretty low.
DATE TIME MHz CPU_0 CPU_1 CPU_2 CPU_3 LOAD%
09/06/15 12:16:00 1603.63 47 45 46 42 1.4
I've got dumps if you want to look at them.
Just as an experiment I'm going to shuffle my memory chips and then take another shot or two at memtest86+
I'm attaching dm log if your interested.