
Contents
1  | Introduction  | ..............................................................................................................  | 9  | |
  | 1.1  | Objective  | 9  | |
  | 1.2  | Scope  | 9  | |
  | 1.3  | References  | 9  | |
  | 1.4  | Definition of Terms  | 10  | |
2  | Thermal/Mechanical Reference Design  | 13  | ||
  | 2.1  | Mechanical Requirements  | 13  | |
  | 
  | 2.1.1  | Processor Mechanical Parameters  | 13  | 
  | 
  | 2.1.2  | 14  | |
  | 
  | 2.1.3  | 18  | |
  | 2.2 Processor Thermal Parameters and Features  | 19  | ||
  | 
  | 2.2.1  | Thermal Control Circuit and TDP  | 19  | 
  | 
  | 2.2.2  | Digital Thermal Sensor  | 20  | 
  | 
  | 2.2.3  | Platform Environmental Control Interface (PECI)  | 21  | 
  | 
  | 2.2.4  | Multiple Core Special Considerations  | 21  | 
  | 
  | 2.2.5  | Thermal Profile  | 24  | 
  | 
  | 2.2.6  | TCONTROL Definition  | 25  | 
  | 
  | 2.2.7  | Thermal Profile Concepts for the   | 
  | 
  | 
  | 
  | Processor 5400 Series  | 26  | 
  | 
  | 2.2.8  | Performance Targets  | 28  | 
  | 2.3  | Fan Fail Guidelines  | 32  | |
  | 2.4 Characterizing Cooling Solution Performance Requirements  | 33  | ||
  | 
  | 2.4.1  | Fan Speed Control  | 33  | 
  | 
  | 2.4.2  | Processor Thermal Characterization Parameter Relationships  | 34  | 
  | 
  | 2.4.3  | Chassis Thermal Design Considerations  | 36  | 
  | 2.5 Thermal/Mechanical Reference Design Considerations  | 37  | ||
  | 
  | 2.5.1  | Heatsink Solutions  | 37  | 
  | 
  | 2.5.2  | Thermal Interface Material  | 38  | 
  | 
  | 2.5.3  | Summary  | 38  | 
  | 
  | 2.5.4  | Assembly Overview of the Intel Reference Thermal Mechanical Design  | 39  | 
  | 
  | 2.5.5  | Thermal Solution Performance Characteristics  | 41  | 
  | 
  | 2.5.6  | Thermal Profile Adherence  | 42  | 
  | 
  | 2.5.7  | Components Overview  | 45  | 
  | 
  | 2.5.8  | Boxed Active Thermal Solution for the   | 
  | 
  | 
  | 
  | Xeon® Processor 5400 Series Thermal Profile  | 49  | 
A  | 1U Alternative Heatsink Thermal/Mechanical Design  | 53  | ||
  | A.1  | Component Overview  | 53  | |
  | A.2 Thermal Solution Performance Characterics  | 54  | ||
  | A.3  | Thermal Profile Adherence  | 54  | |
B  | Mechanical Drawings  | 57  | ||
C  | Heatsink Clip Load Methodology  | 83  | ||
  | C.1  | Overview  | 83  | |
  | C.2  | Test Preparation  | 83  | |
  | 
  | C.2.1  | Heatsink Preparation  | 83  | 
  | 
  | C.2.2  | Typical Test Equipment  | 86  | 
  | 
  | C.2.3  | Test Procedure Examples  | 86  | 
  | 
  | C.2.4  | 86  | |
  | 
  | C.2.5  | Preload Degradation under Bake Conditions  | 87  | 
3  |