AMD’s New Series of Dual-Core CPUs for Socket AM2
So, what CPU models currently employ the 65nm core? You’ll get the answer in the following table which shows the current status of the Athlon 64 X2 for Socket AM2 series.
As you can see, the 5000+ model is right now the only one in the Athlon 64 X2 series that can be based on different cores. Yet it’s simple to differentiate the cores in this case – by the typical heat dissipation. CPUs with the new 65nm core have a typical heat dissipation of 65W, which equals that of the Energy Efficient models on the Windsor core (AMD hasn’t been able to offer an energy-efficient version of the Athlon 64 X2 5000+ until now, though).
Thus, the Brisbane core allows AMD to transform its Energy Efficient processors into truly mass products. The 65nm tech process helps reduce the heat dissipation and the TDP of the new mainstream Athlon 64 X2 processors is indeed the same as that of the competing Intel Core 2 Duo series.
The clock rates of the other processors on the Brisbane core do not cross the frequencies of the Windsor-core CPUs, except for the 5000+ model. This is achieved by means of the fractional multipliers available in the new CPUs. The Brisbane-core CPUs have acquired those ratings that used to belong to midrange models with a total of 2MB of L2 cache memory. Such models have been excluded from the series by now, so only the Athlon 64 X2 5200+ and 5600+ models and the Athlon 64 FX series currently have that much of cache.
AMD plans to enlarge the range of dual-core Brisbane-based processors (supposedly in the second quarter of 2007) by releasing models with ratings of 5200+ and 5400+ and clock rates of 2.7GHz and 2.8GHz, respectively. Besides that, the bottom part of the 65nm CPU series is expected to be duplicated with more economical solutions with a typical heat dissipation of 35W.