If anyone is interested in knowing what core their Athlon II X4 620 is before installing it:
The clue is in the first string of characters and the two character string that directly follows. If the first string contains an AC substring and the following string contains the same it's a Deneb core, however if it's "AD" it is a L3 cacheless Propus core.
E.g.-
CACZC AC 0933 DPMW <-- Deneb (L3 Cache Disabled)
CADZC AD 0933 DPMW <-- Propus (No L3 Cache)
Being able to unlock 6mb L3 cache is quite a bonus and combined with a 2.60GHz clockspeed and a £75 pricetag, it could be a bit of a bargain.