Fan Connector Current Capability; Power Supply Considerations - Intel D845GBV Product Supplement Document

Product Supplement Document for the Intel Desktop Board D845GBV
✏
NOTE
IBM PS/2 Port Specification (Sept 1991) states:
•
275 mA for keyboard
•
70 mA for the mouse (nonwake-enable 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
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NOTE
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.

2.6.4 Fan Connector Current Capability

Table 23 lists the current capability of the fan connectors on the Desktop Board D845GBV.
Table 23.

Fan Connector Current Capability

Fan Connector
Processor fan
Front chassis fan
Rear chassis fan

2.6.5 Power Supply Considerations

CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5 V standby
current. Failure to do so can damage the power supply. The total amount of standby current
required depends on the wake devices supported and manufacturing options. Refer to
Section 2.6.3 on page 29 for additional information.
System integrators should refer to the power usage values listed in Table 21 when selecting a
power supply for use with the Desktop Board D845GBV.
Measurements account only for current sourced by the Desktop Board D845GBV while running in
idle modes of the started operating systems.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the following recommendations found in the indicated
sections of the ATX form factor specification.
30
Maximum Available Current
1.00 A
0.50 A
0.35 A