AMD strictly moderated (AMD)

[jhalada]

...All Socket M2 processors will be based on a common DDR2 memory controller that is validated for 333 MHz operation (DDR2-667), with only the cache size and clock speed differentiating the individual processors. There will be 2 x 1 MB or 2 x 512 KB L2 cache for the dual cores, 512 KB L2 cache for the single core Athlon 64 models and 256 KB for the Sempron series. While Intel's chipset specifications officially support 4 clock CAS latencies for DDR2-667 memory only, there is some headroom for AMD to optimize the memory interface for CAS 3. This circumstance could become significant, as the performance difference between the current Socket 939 processors and their upcoming Socket M2 counterparts will be rather small, according to sources.

The Socket M2 launch will be flanked by at least four Athlon 64 X2 models, which are based on the 90 nm Windsor core. These processors will be running the clock speeds we are familiar with today. However, AMD will introduce an Athlon 64 X2 5000+ clocked at 2.6 GHz and equipped with 1x 1 MB L2 cache. Frequent readers of TG Daily and Tom's Hardware Guide may now notice that these are the exact specifications of the Athlon 64 FX-60 that recently was launched. This FX-60 processor will be replaced by a 2.8 GHz FX-62 at M2 launch.

The single core Athlon 64 family will be slimmed down to just three models integrating the 90 nm Orleans core. The Athlon 64 4000+ will be running at 2.6 GHz, as it comes with 512 KB L2 cache only (today's 4000+ is a 1 MB part). The 3800+ runs at 2.4 GHz; the Athlon 64 3500+ will be the entry level chip at 2.2 GHz. Both the Athlon 64 and the Athlon 64 X2 will support AMD's virtualization technology known as "Pacifica."

Last but not least, the Sempron family will consist of four members at the time of M2 launch. All Sempron processors are based on the 90 nm Manila core and carry only 256 KB L2, but they do come with AMD's dual channel DDR2-667 interface. This potentially could make Sempron the clearly better choice when compared to Intel's Celeron. The Sempron models 3500+, 3400+, 3200+ and 3000+ will run at 2.2, 2.0, 1.8 and 1.6 GHz, respectively. 3600+ and 3800+ models 2.4 and 2.6 GHz apparently are available already and could be added to the line-up, as soon as Intel speeds up the Celeron family.
http://www.tgdaily.com/2006/01/13/amd_m2_platform_launch/