FIGURE 9.1 Advertised and Measured Dynamic Power Range for CompuLab’s fit-PC2.The Advertised Power Range Covers 66% of Peak, Whereas the Measured Value, When Accountingfor Active I/O Devices, Covers 81% of the Observed Peak.

FIGURE 9.2 Power Consumption and Efficiency for a System With a Dynamic Power Range Down to 50% of Peak Performance.Power is Normalized to Peak Consumption.Efficiency is Calculated by Dividing Utilization by Normalized Power.

FIGURE 9.3 Power Consumption and Efficiency for a System With a Dynamic Power Range Down to 10% of Peak Performance. Power is Normalized to Peak Consumption.Efficiency is Calculated by Dividing Utilization by Normalized Power.

FIGURE 9.4 The Organization of ACPI in a Computer System. From the Advanced Configuration and Power Interface Specification, Revision 4.0.

FIGURE 9.5 Relationship between Global, CPU, and Device States in ACPI. From the Advanced Configuration and Power Interface Specification, Revision 4.0.

FIGURE 9.6 Screen Capture of the PowerTOP Interactive Console Interface.