Processor plays major role in a computer. One should carefully decide about the type of processor and its speed before making a choice. Currently Core 2 Duo processor are very common in use, in which two processor used to be fit on a single chip. Also there are Core 2 Quad are multi chip processors which offer twice the performance of a Dual Core processors. The current Core processors include the latest Intel Core i7, Intel Core i5 and Intel Core i3 etc. Pentium chip is one of the most popular brands of processor. Now multi-core processors are available. A dual-core processors has two cores, a quad-core processor contains four cores and a hexa-core processor contains six cores. Multi-core processors implement multi-processing which improves performance and speed of executions. Pentium processor is a series of x86 compatible microprocessors manufactured by Intel.