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Technical Reference

The power supply must comply with the following recommendations found in the indicated

sections of the ATX form factor specification.

• The potential relation between 3.3 VDC and +5 VDC power rails (Section 4.2)

• The current capability of the +5 VSB line (Section 4.2.1.2)

• All timing parameters (Section 4.2.1.3)

• All voltage tolerances (Section 4.2.2)

For information about Refer to

The ATX form factor specification

Section 1.5, page 18

2.12 Thermal Considerations

CAUTION

Ensure that the ambient temperature does not exceed the board’s maximum operating temperature.

Failure to do so could cause components to exceed their maximum case temperature and

malfunction. For information about the maximum operating temperature, see the environmental

specifications in Section 2.14.

CAUTION

Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do

so may result in damage to the voltage regulator circuit. The processor voltage regulator area

(item A in Figure 21) can reach a temperature of up to 85

C in an open chassis.

Figure 21 shows the locations of the localized high temperature zones.

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