Has this processor ever been used before at its normal speed? New motherboard? I would first try to re-flash the BIOS. If that doesn't work, it would seem to me to either be a defective board or the CPU.
I honest dont know , i bought it 3 years ago brand new ofc, i never test it before, until i started to play some games a while ago , i noticed that a have litlle twiches and lags while i play , when other guys i know with smaller configurasion dont. i talk to my friend and explane it to him what i have , and he sad to me that i should try to test it to see what is wrong. Than i saw on what GHz my processor working on. I never change any of the components , i bought it that way in the store.