No problem, but photo you posted is removed. There is still hope to make it stable. What clock youre traing for 4 cores? Default or your max OC speeds? Try default - when faul raise voltage - max 1.45V (for further increasing is needed extreme air cooling, water, dice, LN2, etc.
You can find worst core too if youre set afinity to core 1.. to core 4 in steps, then you can add more voltage with ACC to worst/faulty core indepedently to other cores.
Overclocking is hard work, but you can push it harder and maybe you can unlock to 4 stable cores after some tweaking