I've got a question regarding the new Core 2 Duo processors. If they are dual core processors why arnt they list as them. At the minute you have the 6420 which is listed as 2.13ghz with a 4mb cache. Is the 2.13ghz the speed of one of the cores or both of them? If it is the speed of one of them why arnt they listed as 4.26ghz instead?