Datasheet

Technical Reference

2.11 Electrical Considerations

2.11.1 DC Loading

Table 39 lists the DC loading characteristics of the board.

Table 39. DC Loading Characteristics

DC Current at:

Mode DC Power +3.3 V +5 V +12 V -12 V +5 VSB

Minimum loading 199.00 W 5.00 A 10.00 A 10.00 A 0.03 A 0.60 A

Maximum loading 284.00 W 10.00 A 14.00 A 13.30 A 0.10 A 1.40 A

2.11.2 Add-in Board Considerations

The Desktop Board D875PBZ is designed to provide 2 A (average) of +5 V current for each add-in

board. The total +5 V current draw for add-in boards for a fully loaded Desktop Board D875PBZ

(all five expansion slots and the AGP slot filled) must not exceed 12 A.

2.11.3 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 40 lists the current capability of the fan connectors on the Desktop Board D875PBZ.

Table 40. Fan Connector Current Capability

Fan Connector Maximum Available Current

Processor fan 1000 mA

Front chassis fan 600 mA

Rear chassis fan 600 mA

Voltage regulator fan 1000 mA