DP35DP datasheet(53/84 Pages) INTEL

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Technical Reference

2.5

Electrical Considerations

2.5.1

Power Supply Considerations

CAUTION

The +5 V standby line from 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.

Additional power required will depend on configurations chosen by the integrator.

The power supply must comply with the indicated parameters of the ATX form factor

specification.

•

The potential relation between 3.3 VDC and +5 VDC power rails

•

The current capability of the +5 VSB line

•

All timing parameters

•

All voltage tolerances

For example, for a system consisting of a supported 65 W processor (see Section 1.4

on page 15 for a list of supported processors), 1 GB DDR2 RAM, one hard disk drive,

one optical drive, and all board peripherals enabled, the minimum recommended

power supply is 300 W. Table 25 lists the recommended power supply current values.

Table 25. Recommended Power Supply Current Values

Output Voltage

3.3 V

5 V

12 V1

12 V2

-12 V

5 VSB

Current

15 A

10 A

0.3 A

3.0 A

For information about

Refer to

Selecting an appropriate power supply

http://support.intel.com/support/motherboards/desktop/sb/

CS-026472.htm

2.5.2

Fan Header Current Capability

CAUTION

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

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

component damage that will halt fan operation.

Table 26 lists the current capability of the fan headers.

Table 26. Fan Header Current Capability

Fan Header

Maximum Available Current

Processor fan

3.0 A

Front chassis fan

1.5 A

Rear chassis fan

1.5 A

Auxiliary rear chassis fan

2.5 A

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