Correct the new processor was an I3, and you're right that could have been it as well.  Fortunately the shotgun resolution approach on the mother board/CPU/memory seemed to do the trick!

The rig has actually been doing well.  It's been running for about 2 days now with 0 errors.

One of the regular 1070ti's is running a but higher than the other card [54 degrees vs 44 degrees].  I thought it kind of odd to have that much of a difference.  Could be card placement (54 degree card is close by the processor fan).

Figured that may be a concerning point to keep in mind if I do any overclocking. 

Thanks everyone for the comments/help, I appreciate it!