Most likely a repackaged sample.
Return it if it comes with little or no cost at all, or just kill it and apply for standard RMA, if you don't know how to do it I'll help you.
What motherboard do you have and what are your other CPU voltage/llc/etc settings?(post a pic if you can)
LLC level 2 (was most stable without huge spikes in voltage)
PLL overvoltage enabled
VTT 1.013 volts I believe
PLL voltage around 1.8 volts
Motherboard is in my Sig. ASRock P67 extreme 4 gen 3
EDIT: It was packaged really well. Looked absolutely brand new, everything looked perfect.