CPU World published the specifications of AMD's Opteron 4200 series. It includes eight Valencia-based processors, four with six cores and another four with eight cores.
Like Opteron 4100 family, 4200 family is a mix of standard-, mid- and low-power microprocessors. The only known at this time low-power "Valencia" model is Opteron 4256 EE. This eight-core part runs at 2.5 GHz, and has 32 Watt Average CPU Power, which, we believe, corresponds to 35W TDP.
Two mid-power Opterons are six-core 4228 HE and eight-core 4274 HE. These processors come with 2.8 GHz and 2.5 GHz clock speeds, and they both boast 50W ACP (65W TDP).
All remaining models have 75 Watt ACP, or 95 Watt TDP. Opteron 4226, 4234 and 4238 have 6 CPU cores, and operate at 2.7 GHz, 3.1 GHz and 3.3 GHz. Opteron 4280 and 4284 have 8 cores, although their clock frequencies are lower, only 2.8 GHz and 3 GHz.