Intel Core 2 Duo: E0 vs C0
 

Core 2 Duo E8600 launched recently and with it we saw the introduction of a new stepping. The previous stepping of the E8000 series was "C0", while E8600 had been blessed with the new "E0". At the introduction of a new stepping other models are usually also transferred to the new stepping that also inherits its properties.

http://www.nordichardware.com/Articles/?skrivelse=547

thanks:)