AMD athlon ii x3 455, Unlocking / stepping code meaning?

[meh100]

Hello,
Just bough an athlon ii x3 and was wondering about unlocking potential. Seen around on the net that you can tell what your athlon tri core CPU started out as originally by the stepping code?
Searching it for ages with no luck.
Anyway the stepping code starts NADIC AD... what does this mean in terms of that..?

Thanks

 

[Baralis]

http://www.cpu-world.com/info/AMD/Unlocking_cores_and_L3.html

The AD means it was a Propus die.