Note that Core 2 Duo and Core Duo chips without the ... core with higher clock and bus speeds. In late 2006, Intel introduced Core 2 Quad chips, which were two dual-core Core 2 chips in a single ...

Note that Core Duo and Core 2 Duo chips are not the same (see Intel Core). The Core Solo CPU was a single-core version of the Core Duo. Dual core chips rejected in manufacturing were turned into ...