In what ways are dual-core processors different from single core processor ? Are dual core processors different form multi-processors ? If yes, then how ? What are logical and physical CPUs ?
closed as off topic by Dennis Williamson, Bart Silverstrim, Adam Gibbins, squillman, Chealion Nov 6 '09 at 23:05
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Dual core processors basically mean that you have multiple (2) processes on the single die. Effectively, it gives you two processors in the one package.
These days Quad core processes are all but the standard and this obviously provides you with 4 processes on the single die. Why would you care? Well the more cores the more CPU performance you're going to get. Historically to get more CPU (processing) power on a machine you'd need to install an faster, entirely new chip or a second processor. These days, given most chips have more or one processor then this is rarely necessary.
"Physical CPUs" refer to the actually physical chips themselves which can potentially contain 1, 2, 4 or even 6 separate cores on the one chip.
A Dual Core processor is a multi-core processor with just two cores.
A dual-core processor running at 2GHz will not give you the same performance as a single-core processor running at 4GHz but it will run much cooler. It is the physical limitation of exponential increase in power with speed which has forced processor manufacturers to resort to multi-core technology.
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