Intel Core2 Duo Desktop Processor, Intel Pentium Processor, and Intel Pentium 4 Processor 6x1 Sequence

4 Thermal and Mechanical Design Guidelines
4.2.10 Digital Thermal Sensor.............................................................39
4.2.11 Platform Environmental Control Interface (PECI)..........................40
5 Intel
®
Enabled Balanced Technology Extended (BTX) Reference solution.................41
5.1 Overview of the Balanced Technology Extended (BTX) Reference Design......41
5.1.1 Target Heatsink Performance ....................................................41
5.1.2 Acoustics ...............................................................................42
5.1.3 Effective Fan Curve .................................................................43
5.1.4 Voltage Regulator Thermal Management.....................................44
5.1.5 Altitude..................................................................................45
5.1.6 Reference Heatsink Thermal Validation.......................................45
5.1.7 Fan Performance for Active Heatsink Thermal Solution..................45
5.2 Environmental Reliability Testing............................................................46
5.2.1 Structural Reliability Testing .....................................................46
5.2.2 Power Cycling.........................................................................48
5.2.3 Recommended BIOS/Processor/Memory Test Procedures ..............48
5.3 Material and Recycling Requirements ......................................................48
5.4 Safety Requirements ............................................................................49
5.5 Geometric Envelope for Intel
®
Reference Balanced Technology
Extended (BTX) Thermal Module Assembly...............................................
49
5.6 Preload and TMA Stiffness .....................................................................50
5.6.1 Structural Design Strategy........................................................50
5.6.2 TMA Preload vs. Stiffness .........................................................50
6 ATX Thermal/Mechanical Design Information.......................................................53
6.1 ATX Reference Design Requirements.......................................................53
6.1.1 Target Heatsink Performance ....................................................53
6.1.2 Acoustics ...............................................................................54
6.1.3 Altitude..................................................................................55
6.1.4 Heatsink Thermal Validation .....................................................55
6.1.5 Fan Performance for Active Heatsink Thermal Solution..................55
6.2 Environmental Reliability Testing............................................................56
6.2.1 Structural Reliability Testing .....................................................56
6.2.2 Power Cycling.........................................................................58
6.2.3 Recommended BIOS/Processor/Memory Test Procedures ..............59
6.3 Material and Recycling Requirements ......................................................59
6.4 Safety Requirements ............................................................................60
6.5 Geometric Envelope for Intel
®
Reference ATX Thermal Mechanical Design ....60
6.6 Reference Attach Mechanism..................................................................61
6.6.1 Structural Design Strategy........................................................61
6.6.2 Mechanical Interface to the Reference Attach Mechanism ..............62
7 Intel
®
Quiet System Technology (Intel
®
QST) .....................................................65
7.1 Intel
®
QST Algorithm............................................................................65
7.1.1 Output Weighting Matrix ..........................................................66
7.1.2 Proportional-Integral-Derivative (PID)........................................66
7.2 Board and System Implementation of Intel
®
QST......................................68
7.3 Intel
®
QST Configuration and Tuning.......................................................70
7.4 Fan Hub Thermistor and Intel
®
QST ........................................................70
Appendix A LGA775 Socket Heatsink Loading ......................................................................71
A.1 LGA775 Socket Heatsink Considerations ..................................................71