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Technical Reference

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NOTES

• IBM PS/2 Port Specification (Sept 1991) states:

 275 mA for keyboard

 70 mA for the mouse (nonwake-enabled device)

PCI/AGP requirements are calculated by totaling the following:

 One wake-enabled device @ 375 mA, plus

 Five nonwake-enabled devices @ 20 mA each, plus

USB requirements are calculated as:

 One wake-enabled device @ 500 mA

 USB hub @ 100 mA

 Three USB nonwake-enabled devices connected @ 2.5 mA each

• Both USB ports are capable of providing up to 500 mA during normal G0/S0 operation. Only

one USB port will support up to 500 mA of stand-by-current (wake-enabled device) during

G1/S3 suspended operation. The other port may provide up to 7.5 mA (three nonwake-enabled

devices) during G1/S3 suspended operation.

2.11.4 Fan Connector Current Capability

CAUTION

The processor fan must be connected to the processor fan connector, not to a chassis fan

connector. Connecting the processor fan to a chassis fan connector may result in onboard

component damage that will halt fan operation.

Table 57 lists the current capability of the fan connectors on the Desktop Board D845PEBT2.

Table 57. Fan Connector Current Capability

Fan Connector Maximum Available Current

Processor fan 0.80 A

Front chassis fan 0.30 A

Rear chassis fan 0.30 A

Intel D845PEBT2 User Manual

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