I undervolted my CPU per Core, but the values i ended up with were with FIVE total cores at -50.
I tried LITERALLY every CoreCycler config AND OCCT (CPU + RAM, CPU, LINPACK, MEMORY), but none of them found ANY errors, even after DAYS of running. I have no idea how but within 5 minutes THREE of the -50 Cores failed and a few horus later a fourth one. So if youre undervolting you should probably try to run P95 Blend for a day.