A personal computer (PC) is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end user
A personal computer with an intel dual core processor installed which is a CPU with two separate cores on the same die, each with its own cache. It's the equivalent of getting two microprocessors in one.
A personal computer with an intel core 2 duo processor installed which is latest arsenal of performance-rich technologies, including up to 6MB of shared L2 cache and up to 1333 MHz Front Side Bus. And, all of the latest additions to the Intel Core 2 Duo processor family are built using Intel’s 45nm technology and Hafnium infused circuitry