Intel Pentium 4 Processor on 90 nm Process

64 Datasheet

Thermal Specifications and Design Considerations

To determine a processor's case temperature specification based on the thermal profile, it is

necessary to accurately measure processor power dissipation. Intel has developed a methodology

for accurate power measurement that correlates to Intel test temperature and voltage conditions.

Refer to the Intel

Pentium

4 Processor on 90 nm Process Thermal Design Guidelines for the

details of this methodology.

The case temperature is defined at the geometric top center of the processor IHS. Analysis

indicates that real applications are unlikely to cause the processor to consume maximum power

dissipation for sustained periods of time. Intel recommends that complete thermal solution designs

target the Thermal Design Power (TDP) indicated in Table 26 instead of the maximum processor

power consumption. The Thermal Monitor feature is intended to help protect the processor in the

unlikely event that an application exceeds the TDP recommendation for a sustained period of time.

For more details on the usage of this feature, refer to Section 5.2. In all cases, the Thermal

Monitor feature must be enabled for the processor to remain within specification.

Table 26. Processor Thermal Specifications

Core Frequency

(GHz)

Thermal Design

Power (W)

Minimum T

(°C) Maximum T

(°C) Notes

2.80A/E (PRB = 0) 89 5 See Table 27 and Figure 12

1, 2

3E (PRB = 0) 89 5 See Table 27 and Figure 12

1, 2

3.20E (PRB = 0) 89 5 See Table 27 and Figure 12

1, 2

3.40E (PRB = 0) 89 5 See Table 27 and Figure 12

1, 2

3.20E (PRB = 1) 103 5 See Table 27 and Figure 12

1, 2

NOTES:

1. Thermal Design Power (TDP) should be used for processor thermal solution design targets. The TDP is

not the maximum power that the processor can dissipate.

2. This table shows the maximum TDP for a given frequency range. Individual processors may have a lower

TDP. Therefore, the maximum T

will vary depending on the TDP of the individual processor. Refer to

Figure 12 and Table 27 for the allowed combinations of power and T

3.40E (PRB = 1) 103 5 See Table 27 and Figure 12

1, 2