sorry to say, but that processor is not unlocked.
only the "K" and "X" prefixed parts (3570K, 3770K, 3960x) are able to overclock.
you can overdrive your processor a fractional bit. by increasing the bus clock
from 100 to X depending on RAM and GPU. increasing the bus speed affects those
items and can cause instability more so than CPU instability.
but for multiplier change, not that version. only BLCK bus can be altered and only a bit.