Hey all, thank you very much for the help in diagnosing this issue. Turns out after running the memtest, it almost immediately found problems with the memory.
Have two sticks on the motherboard. Took one out, and the stick left ran just fine. Confirmed that it was the memory stick by swapping the good stick into the slot that was bad, and memtest ran just fine. Also put the bad stick in the good slot, and it found problems within 30 seconds.
Just bought the ram 4 months ago, upgrading from 16GB to 32GB, so trying to get an RMA going with G-skill, to get a replacement. Luckily with 32GB and two sticks, I can run off the 16GB for a while while trying to get a new ram stick. (I sold the 16GB pair.)
I run a weekly backup of the appdata on the cache drive and is the only thing I keep permanently on the cache, so not much lost after a format of the cache and a restore of the appdata.
After all of this, I am hoping my system is back to normal operating. Thank you again for all of the help troubleshooting.