Standby Current Requirements - Intel D845GLLY Specification

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2.6.3 Standby Current Requirements

CAUTION

If the standby current necessary to support multiple wake events from the PCI and/or USB buses

exceeds power supply capacity, the Desktop Board D845GLLY may lose register settings stored in

memory, etc. Calculate the standby current requirements using the steps described below.

Power supplies used with the Desktop Board D845GLLY must be able to provide enough standby

current to support the Instantly Available PC (ACPI S3 sleep state) configuration as outlined in

Table 20 below.

Values are determined by specifications such as PCI 2.2. Actual measured values may vary.

To estimate the amount of standby current required for a particular system configuration, standby

current requirements of all installed components must be added to determine the total standby

current requirement. Refer to the descriptions in Table 20 and review the following steps.

1. Note the total D845GLLY standby current requirement.

2. Add to that the total PS/2 port standby current requirement if a wake-enabled device is

connected.

3. Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices

installed and multiply by the standby current requirement.

4. Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices

installed and multiply by the standby current requirement.

5. Add all additional wake-enabled devices' and nonwake-enabled devices' standby current

requirements as applicable.

6. Add all the required current totals from steps 1 through 5 to determine the total estimated

standby current power supply requirement.

Table 20.