On mobile AMD Athlon 4 processors, AMD offers a technology called PowerNow! that controls your notebook computer's level of processor performance by dynamically adjusting its operating frequency and voltage according to the task at hand. At release, Windows XP Home and Professional Editions did not have the ability to take advantage of the AMD PowerNow! functionality. Laptop computers with the AMD Athlon 4 processor do not have the improved battery performance that is offered by the PowerNow! technology.
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