Introduction

Intel

955X Express Chipset Thermal/Mechanical Design Guide 7

1 Introduction

As the complexity of computer systems increases, so do the power dissipation requirements. Care

must be taken to ensure that the additional power is properly dissipated. Typical methods to

improve heat dissipation include selective use of ducting, and/or passive heatsinks.

The goals of this document are to:

• Outline the thermal and mechanical operating limits and specifications for the Intel

82955X

Express Chipset Memory Controller Hub (MCH).

• Describe a reference thermal solution that meets the specification of the 82955X MCH.

Properly designed thermal solutions provide adequate cooling to maintain the MCH die

temperatures at or below thermal specifications. This is accomplished by providing a low local-

ambient temperature, ensuring adequate local airflow, and minimizing the die to local-ambient

thermal resistance. By maintaining the MCH die temperature at or below the specified limits, a

system designer can ensure the proper functionality, performance, and reliability of the chipset.

Operation outside the functional limits can degrade system performance and may cause

permanent changes in the operating characteristics of the component.

The simplest and most cost effective method to improve the inherent system cooling

characteristics is through careful design and placement of fans, vents, and ducts. When additional

cooling is required, component thermal solutions may be implemented in conjunction with system

thermal solutions. The size of the fan or heatsink can be varied to balance size and space

constraints with acoustic noise.

This document addresses thermal design and specifications for the 82955X MCH component

only. For thermal design information on other chipset components, refer to the respective

component datasheet. For the ICH7, refer to the Intel

I/O Controller Hub 7 (ICH7) Thermal

Design Guidelines.

Note: Unless otherwise specified, the term MCH refers to the Intel

82955X Express chipset MCH.

1 2 3 4 5 6 7 8 9 10 11 12 ... 35 36

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Models 6472 & 6474

A versatile instrument

New measurement concept

GROUND RESISTIVITY

MEASUREMENT

GROUND POTENTIAL MEASUREMENT

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Intel 955X Manuale Utente Pagina 7

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