Notebook PC users who upgrade to Microsoft’s Windows Vista may have to disable some of the new operating system’s flashy graphics features to avoid seeing a decrease in battery life compared to when running Windows XP.

The drop will come from the extra power needed to run the high-end processors, graphics cards, and memory capacity required to support Vista. Microsoft has designed the new OS to deliver novel visual effects such as the translucent “Aero” windows on the desktop interface and to offer improved performance as a digital media hub. The business version of the OS was released last month, with the consumer version due out next month.

“Vista demands more computer resources for a given application than XP does. So you need a heavier battery, or you will have shorter battery life because of the greater demand for watts,” said Phil Hester, chief technology officer of Advanced Micro Devices, in remarks made at the company’s annual analyst day in New York last week.

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