Users Guide

Viewing and conguring power cap policy
When power cap policy is enabled, it enforces user-dened power limits for the system. If not, it uses the hardware power protection policy
that is implemented by default. This power protection policy is independent of the user dened policy. The system performance is
dynamically adjusted to maintain power consumption close to the specied threshold.
Actual power consumption may be less for light workloads and momentarily may exceed the threshold until performance adjustments are
completed. For example, for a given system conguration, the Maximum Potential Power Consumption is 700W and the Minimum Potential
Power Consumption is 500W. You can specify and enable a Power Budget Threshold to reduce consumption from its current 650W to
525W. From that point onwards, the system's performance is dynamically adjusted to maintain power consumption so as to not exceed the
user-specied threshold of 525W.
If the power cap value is set to be lower than the minimum recommended threshold, iDRAC may not be able maintain the requested power
cap.
You can specify the value in Watts, BTU/hr, or as a percentage (%) of the recommended maximum power limit.
When setting the power cap threshold in BTU/hr, the conversion to Watts is rounded to the nearest integer. When reading the power cap
threshold back, the Watts to BTU/hr conversion is again rounded in this manner. As a result, the value written could be nominally dierent
than the value read; for example, a threshold set to 600 BTU/hr will be read back as 601 BTU/hr.
Conguring power cap policy using web interface
To view and congure the power policies:
1 In iDRAC Web interface, go to Overview > Server > Power/Thermal > Power Conguration > Power Conguration. The Power
Conguration page is displayed.
The Power Conguration page is displayed. The current power policy limit is displayed under the Currently Active Power Cap Policy
section.
2 Select Enable under iDRAC Power Cap Policy.
3 Under User-Dened Limits section, enter the maximum power limit in Watts and BTU/hr or the maximum % of recommended system
limit.
4 Click Apply to apply the values.
Conguring power cap policy using RACADM
To view and congure the current power cap values, use the following objects with the set command:
• System.Power.Cap.Enable
• System.Power.Cap.Watts
• System.Power.Cap.Btuhr
• System.Power.Cap.Percent
For more information, see the iDRAC RACADM Command Line Interface Reference Guide available at dell.com/idracmanuals.
Conguring power cap policy using iDRAC settings utility
To view and congure power policies:
1 In iDRAC Settings utility, go to Power Conguration.
Monitoring and managing power
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