The Power Budget Capabilities Register Set
These registers permit power budgeting software to allocate power more effectively based on information provided by the device through its power budget data select and data register. This feature is similar to the data select and data fields within the power management capability registers. However, the power budget registers provide more detailed information that is useful to software when determining the effects of expansion cards that are added during runtime on the system power budget and cooling requirements. Through this capability, a device can report the power it consumes:
from each power rail
in various power management states
in different operating conditions
These registers are not required ...
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