What is Quad Core?

A Quad core CPU contains a chip with four independent units called as cores that read and execute instructions. It is quite similar to the dual core CPU technology, but has four core processors that can process the instructions such as add, move data and branch at the same time.

Within the chip of a quad core processor, each core operates in conjunction with other circuits like cache, input/ output ports, and memory management. The individual core in a processor helps in increasing the overall speed for programs compatible with parallel processing. Manufacturers of the processor typically integrate the cores onto a single semi conductor wafer, or onto multiple semi conductor wafer within a single IC package. Quad core processor has become widely used across different devices due to the fact that the clock speeds of processors have plateaued. There are some examples of quad-core CPUs such as the Intel Core 2 Quad, AMD Phenom X4 , Intel Nehalem processes

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