Question: what is the difference between celeron and centreno? 

Answer: A Celeron is any of a large number of different budget x86 microprocessors produced by Intel and marketed as a budget/value CPU line. The Celeron family complements Intel's higher-performance (and more expensive) Pentium CPUs family. Introduced in April 1998, the first Celeron was based on the Pentium II core. Later versions were based on the Pentium III, Pentium 4, and Pentium M. These processors are suitable for most applications, but their performance is somewhat limited when it comes at running intense applications, such as cutting edge games or graphical modeling programs, especially when compared to that of their high-end counterparts.\n\n------------------------------------------------------------------\n\nThe new chip family, which includes the processor formerly known by the code name Banias, was designed to help manufacturers build notebooks that use less power and offer extended battery life, along with better wireless networking capabilities. Instead of just giving Banias a variation on the company's well-known Pentium moniker, Intel decided to set the family of chips apart with a completely new name. A few insiders at Intel had been jokingly referring to the Banias chip as Mobilium, but Intel will call the new chip itself Pentium-M. Intel says the Centrino name, and a new logo that goes with it, suggest flight and mobility. The name is a blend of the words "center" and "neutrino," the company said. (A Google search on "centrino" also reveals the term to be a common one in Italian embroidery circles.) "The Centrino brand signifies a new generation of mobile PCs that will change where and how people compute," Pam Pollace, vice president and director of Intel's corporate marketing group, said in a statement. The Centrino family will also include chipsets, which handle data inside a PC, and wireless radio modules designed to allow new notebooks to use 802.11 wireless networking.
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