Aurora R7, powers off randomly, no BSOD

My R7, out of warranty, continues to power itself off randomly. In order to start it again, I have to disconnect the power cable,  and then hold the button to release the remaining power. 

This issue began happening a few weeks ago. I was initially able to determine that there was an issue with Killer that was causing the problem. I disabled the driver and the issue appeared solved. Until today. I have had this happen a dozen times in the last two hours. Most of the occurrences are so quick, that I am unable to even access the event log or anything else before it happens again. This quick frequency is different from previous occurrences. I used to be able to get a couple of hours between instances.

When I was able to access the event log, I saw DCOM issues as well as a Kernel issue that seemed to occur just before the machine would power off. Unfortunately, I don't have access to the screenshots as I can't get the desktop to remain on long enough to access them.

I changed the CMOS battery two weeks ago.

Do I possibly need a new power supply?  Any help would be greatly appreciated.