Intel Pentium 4 Processor on 90 nm Process Thermal and Mechanical Design Guidelines

Intel® Thermal/Mechanical Reference Design Information
R
Intel
®
Pentium
®
4 on 90 nm Process Thermal Design Guide 37
4 Intel
®
Thermal/Mechanical
Reference Design Information
4.1 Intel
®
Validation Criteria for the Reference Design
4.1.1 Thermal Performance
4.1.1.1 Reference Heatsink Performance Target
Table 2 provides the heatsink performance target for loadline A and loadline B Pentium 4
processor on 90 nm process.
The table also includes a T
A
assumption of 38 °C for the Intel reference thermal solution at the
processor fan heatsink inlet discussed in Section 3.2.2.1. An external ambient temperature to the
chassis of 35 °C is assumed, resulting in a temperature rise, T
R
, of 3 °C. Meeting T
A
and Ψ
CA
targets can maximize processor performance (refer to Chapter 3 and Section 3.4).
Refer to the Intel
®
Pentium
®
4 Processor on 90 nm Process Datasheet for detailed processor
thermal specifications.
Table 2. Reference Heatsink Performance Targets
Processor Frequencies
(refer to processor
datasheet)
Thermal
Performance, Ψca
(Mean + 3σ)
T
A
Assumption T
E
Assumption
Loadline B 0.34 °C/W 38 °C 35 °C
Loadline A 0.34 °C/W 38 °C 35 °C