The recent arrival of the updated Piledriver architecture has prompted AMD to retire four more Zambezi chips.
In addition to the already announced retirement of the AMD FX-8150, FX-6200 and FX-4170 chips, AMD will soon cease the production and sales of the AMD FX-8120 (eight cores at 3.1 GHz), FX-6100 (six cores at 3.3 GHz), FX-4130 (four cores at 3.8 GHz) and FX-4100 (four cores at 3.6 GHz).
The chips will disappear by the end of Q2 2013 and will be replaced by the current Piledriver-based FX processors along with some more models.
Source: Fudzilla