This is complicated.
If your chip is like my chip, that had somewhat high vid and ran cool, then it may have "degraded"/break in period. C_N told me that both of his chips needed 0.05v to 0.07v to run stable over time. Now, if a BIOS switch also addded on to this, for example, if change BIOS (B2 version f7e to B2 version f8x or f8f) required 0.05v more vcore--but gave higher 3dmark scores, then you combine cpu breakin+bios...and you get the answer.

Can you go into your BIOS, press CONTROL F1 please, then disable spread spectrum, and see if that helps? (Spread spectrum was unhidden in original B2 bios of UD7 and UD5, then later hidden).