Desktop Board Features
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 may lose register settings stored in memory.
Power supplies used with this board must be able to provide enough standby current to support the standard Instantly Available (ACPI S3 sleep state) configuration as outlined in Table 4. Values are determined by specifications such as PCI 2.2. Actual measurements may vary.
To estimate the total amount of standby current required for a particular system configuration, standby current requirements of all installed components must be added. Refer to the descriptions in and follow the steps outlined below:
1.Note the total D845HV or D845WN board standby current requirement.
2.Add to that the total PS/2 port standby current requirement if a
3.Add, from the PCI 2.2 slots
4.Add, from the PCI 2.2 slots
5.Add all additional
6.Add all the required current totals from steps 1 through 5 to determine the total estimated standby current power supply requirement.
Table 4. Standby Current Requirements
Instantly Available Current Support
Estimate for integrated board components
Estimate for
Description
Total for the D845HV/D845WN board
PS/2 ports**
PCI 2.2 slots
PCI 2.2 slots
CNR** (wake enabled)
CNR**
USB ports**
Standby Current Requirements (mA)
770*
345
375
100
875
40
700
*Refer to the Intel Desktop Board D845HV/D845WN Technical Product Specification for the exact standby current requirements
**Dependent upon system configuration
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