Intel's new range of mobile processors (also available running at 600MHz) boost not only the raw performance of notebooks, but offer power consumption and heat reduction improvements. SpeedStep technology provides the full 600MHz and 650MHz speeds to the processors under AC power but drops performance to 500MHz when operating on batteries - a good compromise between performance and mains-free operational time. Of course, should the extra 100-150MHz when running on the battery be required, users can manually override the SpeedStep.
In addition, the processors use 0.18 micron technology, a 0.07 micron fabrication improvement from the previous 0.25 micron Intel standard: this permits higher performance, and reduces power consumption and hence heat generation.
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