Standby Current Requirements - Intel D810E2CA3 Specification

Desktop board

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2.11.3 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 D810E2CA3 board may lose register settings stored in

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

Power supplies used with the D810E2CA3 board must be able to provide enough standby current

to support the Instantly Available (ACPI S3 sleep state) configuration as outlined in Table 49.

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 49 and review the following steps:

1. Note the total D810E2CA3 desktop board standby current requirement.

2. Add the PCI 2.2 slots with wake enabled devices installed and multiply by the standby current

requirement for wake enabled devices.

3. Add the PCI 2.2 slots with wake enabled devices installed, and multiply by the standby current

requirement for non-wake enabled devices.

4. Add all additional wake enabled devices' and non-wake enabled devices' standby current

requirements as applicable.

5. Add all the required current totals from steps 1 through 4 to determine the total estimated

standby current power supply requirement.

Table 49.