Intel 5400 Series manual Preload Degradation under Bake Conditions

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Heatsink Clip Load Methodology

(often on the order of 3 minutes). The time zero reading should be taken at the end of this settling time.

5.Record the preload measurement (total from all three load cells) at the target time and average the values over 10 seconds around this target time as well, i.e. in the interval for example over [target time – 5 seconds; target time + 5 seconds].

C.2.5 Preload Degradation under Bake Conditions

This section describes an example of testing for potential clip load degradation under bake conditions.

1.Preheat thermal chamber to target temperature (45 ºC or 85 ºC for example).

2.Repeat time-zero, room temperature preload measurement.

3.Place unit into preheated thermal chamber for specified time.

4.Record continuous load cell data as follows: Sample rate = 0.1 Hz for first 3 hrs

Sample rate = 0.01 Hz for the remainder of the bake test

5.Remove assembly from thermal chamber and set into room temperature conditions

6.Record continuous load cell data for next 30 minutes at sample rate of 1 Hz.

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Quad-Core Intel® Xeon® Processor 5400 Series TMDG

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Contents Thermal/Mechanical Design Guidelines Quad-Core Intel Xeon Processor 5400 SeriesQuad-Core Intel Xeon Processor 5400 Series Tmdg Contents Figures Preload Test Configuration Tables Initial release of the document Reference Revision Description Date NumberQuad-Core Intel Xeon Processor 5400 Series Tmdg Objective ScopeReferences Definition of Terms Terms and Descriptions Sheet 1Term Description TDP Terms and Descriptions Sheet 2Introduction Parameter Minimum Maximum Unit Mechanical RequirementsProcessor Mechanical Parameters Processor Mechanical Parameters TableQuad-Core Intel Xeon Processor 5400 Series Package Thermal/Mechanical Reference Design Thermal/Mechanical Reference Design Thermal/Mechanical Reference Design Quad-Core Intel Xeon Processor 5400 Series Considerations Thermal Control Circuit and TDP Processor Thermal Parameters and FeaturesDigital Thermal Sensor Platform Environmental Control Interface Peci Multiple Core Special ConsiderationsMultiple Digital Thermal Sensor Operation Processor Input Processor Output Thermal Monitor for Multiple Core ProductsPROCHOT#, THERMTRIP#, and FORCEPR# Heatpipe Orientation for Multiple Core ProcessorsFeature Dimension Processor Core Geometric Center DimensionsEquation 2-1.y = ax + b Thermal ProfileEquation 2-2.TCONTROL= -TOFFSET Tcontrol DefinitionTcontrol and Thermal Profile Interaction Thermal Profile B Performance Targets Thermal/Mechanical Reference Design Thermal/Mechanical Reference Design Parameter Maximum Unit 2U+ CEK, Thermal Profile a1U CEK, Thermal Profile B Fan Fail Guidelines Sea-Level1U Alternative Heatsink Fan Speed Control Characterizing Cooling Solution Performance RequirementsCondition FSC Scheme Processor Thermal Characterization Parameter RelationshipsFan Speed Control, Tcontrol and DTS Relationship Equation 2-3.ΨCA= Tcase TLA / TDPEquation 2-4.ΨCA= ΨCS + ΨSA ExampleEquation 2-6.ΨSA= ΨCA − ΨCS = 0.27 − 0.05 = 0.22 C/W Chassis Thermal Design ConsiderationsChassis Thermal Design Capabilities and Improvements Equation 2-5.ΨCA= Tcase TLA / TDP = 68 45 / 85 = 0.27 C/WHeatsink Solutions Thermal/Mechanical Reference Design ConsiderationsHeatsink Design Considerations Summary Thermal Interface MaterialGeometric Envelope Assembly DrawingStructural Considerations of CEK 17 U+ CEK Heatsink Thermal Performance Thermal Solution Performance CharacteristicsEquation 2-8.y = 0.187*X + Thermal Profile AdherenceEquation 2-9.y = 0.246*X + =0.187* X +40Equation 2-10.y = 0.246*X + 1UCEKReference SolutionHeatsink with Captive Screws and Standoffs Components Overview22. Isometric View of the 2U+ CEK Heatsink Processor Minimum Maximum Units CEK Heatsink Thermal Mechanical CharacteristicsRecommended Thermal Grease Dispense Weight Thermal Interface Material TIM24. CEK Spring Isometric View CEK SpringThermal/Mechanical Reference Design Fan Power Supply Fan Specifications Boxed 4-wire PWM/DTS Heatsink SolutionDescription Min Typ Max Unit Steady Startup Systems Considerations Associated with the Active CEK Boxed Processor ContentsThermal/Mechanical Reference Design Figure A-1. Isometric View of the 1U Alternative Heatsink Component OverviewThermal Solution Performance Characterics Thermal Profile AdherenceEquation A-1. y = 0.331*x + = Processor power value W 1U Alternative Heatsink Thermal/Mechanical Design Drawing Description Table B-1. Mechanical Drawing ListFigure B-1 2U CEK Heatsink Sheet 1 Figure B-2 2U CEK Heatsink Sheet 2 Figure B-3 U CEK Heatsink Sheet 3 Figure B-4 2U CEK Heatsink Sheet 4 Figure B-5. CEK Spring Sheet 1 Figure B-6. CEK Spring Sheet 2 Figure B-7. CEK Spring Sheet 3 Mechanical Drawings Mechanical Drawings Mechanical Drawings Mechanical Drawings Mechanical Drawings Mechanical Drawings Figure B-14 U CEK Heatsink Sheet 1 Figure B-15 U CEK Heatsink Sheet 2 Figure B-16 U CEK Heatsink Sheet 3 Figure B-17 U CEK Heatsink Sheet 4 Figure B-18. Active CEK Thermal Solution Volumetric Sheet 1 Figure B-19. Active CEK Thermal Solution Volumetric Sheet 2 Figure B-20. Active CEK Thermal Solution Volumetric Sheet 3 Figure B-21 U Alternative Heatsink 1 Figure B-22 U Alternative Heatsink 2 Figure B-23 U Alternative Heatsink 3 Figure B-24 U Alternative Heatsink 4 Mechanical Drawings Overview Test PreparationHeatsink Preparation Alternate Heatsink Sample Preparation Figure C-3. Preload Test Configuration Table C-1. Typical Test Equipment Test Procedure ExamplesTime-Zero, Room Temperature Preload Measurement Typical Test EquipmentPreload Degradation under Bake Conditions Heatsink Clip Load Methodology Safety Requirements Safety Requirements Reference Heatsink Thermal Verification Environmental Reliability TestingStructural Reliability Testing Intel Verification Criteria for the Reference Designs2.2 Recommended Test Sequence Post-Test Pass CriteriaTable E-1 Use Conditions Environment Material and Recycling Requirements Recommended BIOS/Processor/Memory Test ProceduresQuality and Reliability Requirements Supplier Information Intel Enabled SuppliersFor 1U Additional Suppliers2U Heatsink Alternative CEK Copper Fin Alternative CEK Copper Fin Enabled Suppliers Information 100 Quad-Core Intel Xeon Processor 5400 Series Tmdg