Whats the difference between intel core 2 duo & dual core

[sana 91]

please give me the technical difference between dual core and core 2 dual

 

[vinaykumar5320]

The Pentium Dual Core CPUs have 1 MB of L2 Cache, either a 533 MHz or 800 MHz FSB and clock speeds ranging from 1.46 GHz to 2.20 GHz.

Core 2 Duo CPUs have L2 caches ranging from 2MB to 6MB and clock speeds from 1.06 GHz to 3.16 GHz. The extra cache and higher clock and bus speeds make these generally more expensive and faster than the Pentium Dual Core CPUs.