Core 2 Duo E6420 and Core 2 Duo E6320
From the technological standpoint Core 2 Duo E6420 and E6320 do not have any new features at all. They are the same CPUs on Conroe core with 4MB L2 cache memory. Their clock speeds are 2.13GHz and 1.86GHz respectively. They support 1066MHz FSB. In other words, their only difference from the Core 2 Duo E6400 and E6300 is the large L2 cache. And since they cost the same as their predecessors, Core 2 Duo E6420 and E6320 will eventually oust them from the market.
The detailed specifications of the Core 2 Duo E6420 and E6320 prove that these processors are analogous to the top CPUs on Conroe core. Only the clock speeds are different:
Core 2 Duo E6420
Core 2 Duo E6320
Enhanced Halt State (C1E) Technology
Enhanced Intel Speedstep
Execute Disable Bit
Intel Thermal Monitor 2
Intel Virtualization Technology
As you can see from the table above, the core stepping of the new processors is the same as that of the top Core 2 Duo models. They are also based on the same B2 Conroe core stepping.
The diagnostic CPU-Z utility also reports this fact proving that the new younger Core 2 Duo models and the top members of this processor family are related.
However, if you take a closer look at the screenshots you will notice that the popular CPU-Z utility is not yet quite familiar with the Core 2 Duo E6x20 processors mistakenly recognizing them as Core 2 Duo E6x00.