Electrical computers and digital processing systems: support – Computer power control – Power conservation
Reexamination Certificate
2006-03-21
2006-03-21
Knight, Anthony (Department: 2121)
Electrical computers and digital processing systems: support
Computer power control
Power conservation
C713S310000, C713S323000, C700S075000, C700S296000, C700S300000
Reexamination Certificate
active
07017059
ABSTRACT:
An apparatus and method for replacing a CPU cooling system, for example, a fan, while a computer continues to operate has a mechanism for maintenance personnel to signal that cooling fan replacement is about to begin. In response to the signal, a control mechanism causes the CPU to shift into an operating mode in which heat generation is reduced. In some cases, a clock frequency of the affected CPU and/or a duty cycle at which the CPU operates is reduced. After the fan has been replaced the control mechanism returns the CPU to a normal operational mode, for example, by increasing the clock frequency or duty cycle to a normal level. During the fan replacement procedure, the CPU and its software continues to run at lower than normal performance.
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Advanced Configuration and Power Interface Specification: Compaq Computer Corporation, Intel Corporation, Microsoft Corporation, Phoenix Technologies Ltd. Toshiba Corporation, Revision 2.0C.
Bodell Kent Graham
Law Randall Allan
Londry David Ray
Barnes Crystal J
Cray Canada Inc.
Knight Anthony
Oyen Wiggs Green & Mutala LLP
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