Intel Pentium 4 Processor in the 423-pin Package Thermal Solution Functional Specification

Intel
®
Pentium® 4 Processor Thermal Solution Functional Specification
®
6
Figure 1
shows an exploded view of the thermal solution components.
3. THERMAL REQUIREMENTS
Active thermal solution components should be designed to be in compliance with Pentium® 4
processor thermal specifications and the design constraints identified in this document.
Figure 2
provides the temperature constraint at the case of the processor package (Integrated
Heat Spreader, IHS). For a given chassis, the θca requirement is based on its own ambient
characteristics and Intel's processor thermal specifications. The Pentium 4 processor solution is
required to meet the overall θca requirement of the system that it serves. However, θcs and θsa
are not individually constrained to any requirements. The following list of equations is used in
calculating the thermal performance of the Pentium 4 processor thermal solutions.
θsa = (Tsink – Tamb) / Q
θcs = (Tcase – Tsink) / Q
θca = θcs + θsa
z
y
x