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2. System Reference
SEH-9450-LAS
7
Power Management Features
- Support both ACPI (Advanced Configuration and Power Interface) and legacy (APM) power
management.
- ACPI v2.0 compliant
- APM v1.2 compliant
- PCI bus clock run, Power Management Enable (PME) control, all with hardware automatic wake-up
- Multiple suspends power plane controls and suspends status indicators
- Normal, doze, sleep, suspend and conserve modes
- Global and local device power control
Power Requirements
Your system requires a clean, steady power source for reliable performance of the high frequency CPU on
the product, the quality of the power supply is even more important. For the best performance makes
sure your power supply provides a range of 11.4 volts minimum to 12.6 volts maximum DC power
source.
Power Consumption
For typical configurations, the CPU card is designed to operate with at least a 250W power supply. A
higher-wattage power supply should be used for heavily-loaded configurations.
The power supply must meet the following requirements:
- Rise time for power supply: 2 ms - 20 ms
- Minimum delay for reset to Power Good: 100ms
- Minimum Power down warning: 1 ms
The following table lists the power supply’s tolerances for DC voltages:
Table 2.2. DC voltage tolerance
DC Voltage Acceptable Tolerance
+ 5VSB (Stand by) +5%
+ 12V +5%