It was Prime, i think i need to research how to overclock with this board better, I feel like 4.4 is obtainable.Was that on prime? Your chip seems to be almost identical to mine when testing Prime95 blend for hours. 4.3 stable but 4.4 at 1.33v fails after a few hours. (I tried again last night and it failed after the 6 hour mark this morning too)\
Edit: Seems like my setup is very sensitive to SOC voltage.. I had it at 1.125 in bios which was stable for the few hours mentioned above but failed. I tried higher 1.135v but that fails in 5 minutes. I will try lower and hopefully it's stable.