Thermal/Mechanical Specifications and Design Guidelines
53
Sensor Based Thermal Specification Design Guidance
7
Sensor Based Thermal
Specification Design Guidance
The sensor based thermal specification presents opportunities for the system designer
to optimize the acoustics and simplify thermal validation. The sensor based
specification uses the Digital Thermal Sensor information accessed using the PECI
interface.
This chapter will review thermal solution design options, fan speed control design
guidance and implementation options and suggestions on validation both with the TTV
and the live die in a shipping system.
7.1
Sensor Based Specification Overview
Create a thermal specification that meets the following requirements:
• Use Digital Thermal Sensor (DTS) for real-time thermal specification compliance.
• Single point of reference for thermal specification compliance over all operating
conditions.
• Does not require measuring processor power and case temperature during
functional system thermal validation.
• Opportunity for acoustic benefits for DTS values between T
CONTROL
and -1.
Thermal specifications based on the processor case temperature have some notable
gaps to optimal acoustic design. When the ambient temperature is less than the
maximum design point, the fan speed control system (FSC) will over cool the processor.
The FSC has no feedback mechanism to detect this over cooling, this is shown in the
top half of
The sensor based specification will allow the FSC to be operated at the maximum
allowable silicon temperature or T
J
for the measured ambient. This will provide optimal
acoustics for operation above T
CONTROL
. See lower half of
.
Содержание BX80605X3440 - Quad Core Xeon X3440
Страница 10: ...Introduction 12 Thermal Mechanical Specifications and Design Guidelines...
Страница 26: ...LGA1156 Socket 28 Thermal Mechanical Specifications and Design Guidelines...
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Страница 80: ...Mechanical Drawings 80 Figure B 1 Socket Heatsink ILM Keepout Zone Primary Side for 1U Top...
Страница 81: ...81 Mechanical Drawings Figure B 2 Socket Heatsink ILM Keepout Zone Secondary Side for 1U Bottom...
Страница 87: ...87 Mechanical Drawings Figure B 8 Heatsink Compression Spring...
Страница 88: ...Mechanical Drawings 88 Figure B 9 Heatsink Load Cup...
Страница 89: ...89 Mechanical Drawings Figure B 10 Heatsink Retaining Ring...
Страница 91: ...91 Mechanical Drawings Figure B 12 Heatsink Backplate...
Страница 92: ...Mechanical Drawings 92 Figure B 13 Heatsink Backplate Insulator...
Страница 102: ...Socket Mechanical Drawings 104 Thermal Mechanical Specifications and Design Guidelines...
Страница 106: ...Package Mechanical Drawings 108 Thermal Mechanical Specifications and Design Guidelines...
