Name: Intel DH77DF
Brand: Intel
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Intel Desktop Board DH77DF Technical Product Specification

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 V DC and +5 V DC power rails

• The current capability of the +5 VSB line

• All timing parameters

• All voltage tolerances

For example, for a high power system consisting of a supported 95 W processor (see

Section 1.3 on page 17 for a list of supported processors),

4 GB DDR3 RAM, one high

end video card, one hard disk drive, one optical drive, and all board peripherals

enabled, the minimum recommended power supply is 460 W. Table 37 lists possible

recommended power supply current rail values.

Table 3

7. Recommended Power Supply Current Values (High Power)

Output Voltage 3.3 V 5 V 12 V1 12 V2 -12 V 5 VSB

Current 22 A 20 A 20 A 20 A 0.3 A 2.5 A

For example, for a low power system consisting of a supported 35 W processor (see

Section 1.3 on page 17 for a list of supported processors),

2 GB DDR3 RAM, integrated

graphics, one SSD, one optical drive, and no extra onboard peripherals enabled, the

minimum recommended power supply is a 180 W. Table 38 lists possible

recommended power supply current rail values.

Note: If the correct power supply and

system configuration is used, a smaller power supply will work.

Table 38. Recommended Power Supply Current Values (Low Power)

Output Voltage 3.3 V 5 V 12 V1 12 V2 -12 V 5 VSB

Current 16 A 16 A 12 A N/A 0.3 A 1.5 A

For information about Refer to

Selecting an appropriate power supply http://support.intel.com/support/motherboards/desktop/sb

/CS-026472.htm

Intel DH77DF User Manual

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