Please Try with the minimum configuration using one stick of RAM and see if the problems still persists. let us know the results
What does that mean?
Means that if you have more than one stick of ram you use only one to discard memory issues. Also it would be a good idea to check with the motherboard manufacturer for a bios update. If the problem persists the next course of action would be backup the information and recreate the raid array since it could be the metadata not working properly.