Just recapping what happened in the end.   The last week it got so bad I couldn't boot anything at all, no Live-USBs or anything. So after months of trying to find the problem I finally couldn't narrow it down any more than to the MB or the CPU. Since I had so many errors that pointed to the CPU I decided to open a warranty ticket with Intel. They accepted after I presented my evidence of my problems and replaced my CPU with a new one.   Very nice experience dealing with
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