Err, wrong answer. Look here:
Read the article and you'll see that there's overall a 10% increase IN GAMES if you have the 6MB L3 cache. In other applications, the difference can range from none to 5%. That, and the Phenom II scales much better in terms of performance once you pass 3GHz. Instances of L3 cache unlocking are less than 1% of all Athlon II X4s. The reason some unlocked is because they were rebranded Phenom II X4s, but now that's irrelevant. It was only batches in the first month of production of the Athlon II X4 in where they mixed Propus and Deneb dies. So, it's pretty much completely pointless to mention unlocking.