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Preliminary Information 

AMD Athlon™ 64 and AMD Opteron™ Processors 
Thermal Design Guide 

  26633 Rev. 

3.03 September 

2003 

 

The reference spring clip material is the heat-treatable spring steel, SK7. AMD strongly 
recommends using SK7 or an equivalent material for the spring clip. The clip should be plated 
after heat treatment for cosmetic and anti-corrosive reasons. Table 5 gives the chemical 
composition of SK7. The heat treatment used should bring the ultimate strength of the material to 
a minimum of 1,300 Mega-Pascals (Mpa) or 189 Kilo-pounds per square inch (Ksi) and a yield 
strength to 940 MPa (or 136 Ksi). 
Other materials commonly used for heatsink spring clips have been shown to yield under the high 
load of the initial spring clip deflection, become deformed, and can no longer apply the same load. 

Table 5. Chemical Composition of SK7 Spring Steel 

Composition 

Percentage of the Element 

C 0.60–0.70 

Si Maximum 

0.35 

Mn 0.80–0.90 

P Maximum 

0.030 

S Maximum 

0.030 

Fe Remaining 

Balance 

2.6.3 Retention Frame 

The retention frame serves multiple purposes. During installation, the retention frame provides a 
stop for the spring clip ends used in the thermal reference design solution 1. The retention frame 
also aligns the heatsink and provides a stop for the heatsink in case of a large shock-force event. 
The retention frame serves to hold the solution 1 heatsink assembly together as a single unit for 
shipping and assembly, and aligns and helps to retain the EMC shield.  
The retention frame serves the same function for the thermal reference design solution 2, but it is 
implemented in a different way. The retention frame and backplate are joined to the motherboard 
by the motherboard manufacturers. Two screws securely hold the backplate and retention frame 
together. The six mounting tabs on the retention frame serve as an attachment point for the 

heatsink

 spring clip. The thermal reference design solution 2 utilizes only two of the mounting 

tabs, but the flexibility of the design is increased with the additional mounting tabs. 

2.6.4 Heatsink 

The footprint of the reference design heatsink is 77x68 mm. The highest-power processors may 
require solutions incorporating copper in the base of the heatsink to dissipate heat, taller fins and 
greater fin density to increase surface area, and higher flow fans to increase cooling capacity.  

Because the processor mounting surface extends above the surface of the cam box on the socket, 
the heatsink bottom must be flat. The heatsink must have a flat surface of at least 40x40 mm 
centered over the processor as specified in the reference design drawing. 

26

 

AMD Athlon™ 64 and AMD Opteron™ Processors Thermal Requirements  Chapter 2 

 

Содержание AMD Athlon 64

Страница 1: ...AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide Publication 26633 Rev 3 03 Issue Date September 2003...

Страница 2: ...products including but not limited to the implied warranty of merchantability fitness for a particular purpose or infringement of any intellectual property right AMD s products are not designed intend...

Страница 3: ...sign Requirements 18 2 5 Sample Heatsinks and Attachment Methods 19 2 5 1 Thermal Reference Design Solution 1 19 2 5 2 Thermal Reference Design Solution 2 22 2 6 Thermal Solution Design Considerations...

Страница 4: ...Processors Thermal Design Guide 26633 Rev 3 03 September 2003 A 2 2 Procedure 45 A 3 Motherboard Component Keep Out Areas and Height Restriction Drawings 47 A 4 Thermal Reference Design Solution Comp...

Страница 5: ...a Heatsink Installation Utilizing the Thermal Reference Design Solution 2 24 Figure 11 Example of a Low Cost Heatsink Using Aluminum Extrusion Technology 27 Figure 12 High Performance Heatsink with Co...

Страница 6: ...AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 6 List of Figures...

Страница 7: ...mal Solution Design Requirements for the AMD Athlon 64 and AMD Opteron Processors 18 Table 3 Components for the AMD Athlon 64 and AMD Opteron Processors Thermal Reference Design Solution 1 19 Table 4...

Страница 8: ...AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 8 List of Tables...

Страница 9: ...2 6 on page 25 added Section 2 6 4 3 Required Exhaust Airflow Direction on page 29 added Figure 13 on page 29 revised Section 2 6 5 on page 30 added Figure 14 on page 31 added Figure 15 on page 32 and...

Страница 10: ...AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 10...

Страница 11: ...d AMD Opteron processors 1 1 Summary of Requirements To allow optimal reliability of the AMD Opteron and AMD Athlon 64 processor based systems the thermal and cooling solution should dissipate heat fr...

Страница 12: ...Preliminary Information AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 12 Introduction Chapter 1...

Страница 13: ...on 64 FX and AMD Opteron processors The thermal and mechanical specifications for the 940 pin AMD Athlon 64 FX processor are the same as those for the AMD Opteron processor For the thermal and mechani...

Страница 14: ...pins are removed from the A1 corner of the package and a single pin is removed from the other three corners The electrical and mechanical connection to the motherboard is made with a small solder bal...

Страница 15: ...of the Socket 940 which is used for the AMD Opteron processor As with the Socket 754 it has a 1 27 mm array pitch but has a 31x31 pin array with various pins removed from the package for keying and m...

Страница 16: ...component restrictions for the AMD Athlon 64 is shown in Figure 3 A complete detailed set of drawings is shown in Appendix A 3 on page 47 Thermal solution designers must adhere to these geometric res...

Страница 17: ...mber 2003 AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide Figure 4 Motherboard Component Height Restrictions for the AMD Opteron Processor Thermal Solution Chapter 2 AMD Athlon 64 and AM...

Страница 18: ...esign Requirements for the AMD Athlon 64 and AMD Opteron Processors Symbol Description Minimum Maximum Notes L Length of heatsink 77 mm 77 mm Measurements are for the entire assembly including attache...

Страница 19: ...ard due to clip forces on the heatsink Figure 6 on page 21 shows the assembly components grouped for shipment and how they are used during the final assembly of the system When developing the thermal...

Страница 20: ...and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 Figure 5 AMD Athlon 64 and AMD Opteron Processors Thermal Reference Design Solution 1 20 AMD Athlon 64 and AMD Opteron Pro...

Страница 21: ...eron Processors Thermal Design Guide Figure 6 Thermal Reference Design Solution 1 Components Assembled for Shipment Figure 7 View of an Installed Heatsink Utilizing the Thermal Reference Design Soluti...

Страница 22: ...terial protection hook the clip onto the retention frame and then actuate the cam For the thermal reference design solution 2 the installer needs no tools for the heatsink installation process Figure...

Страница 23: ...on 64 and AMD Opteron Processors Thermal Design Guide Figure 8 Exploded View of the Components Utilized in the AMD Athlon 64 and AMD Opteron Processors Thermal Reference Design Solution 2 Chapter 2 AM...

Страница 24: ...uide 26633 Rev 3 03 September 2003 Figure 9 Thermal Reference Design Solution 2 Components Configured for Shipment Figure 10 View of a Heatsink Installation Utilizing the Thermal Reference Design Solu...

Страница 25: ...of processor The AMD Athlon 64 processor version has a 20 mm square hole while the AMD Opteron processor version has a 26 mm square hole Using a 26 mm hole on both AMD Athlon 64 and AMD Opteron proce...

Страница 26: ...es a stop for the heatsink in case of a large shock force event The retention frame serves to hold the solution 1 heatsink assembly together as a single unit for shipping and assembly and aligns and h...

Страница 27: ...e thermal performance requirements of a particular processor a low cost heatsink may be appropriate for an application An example of a low cost heatsink utilizing extruded aluminum stock is shown in F...

Страница 28: ...incorporate copper into the heatsinks Copper and aluminum are commonly used together in the same heatsink Figure 12 shows an example of a heatsink that would perform better than the low cost extrusion...

Страница 29: ...exhausting from the heatsink be directed across the motherboard processor voltage regulator Motherboard suppliers have designed their motherboards to have voltage regulators located along the long si...

Страница 30: ...gh fan speed to meet these requirements Acoustic noise is a concern for both system builders and AMD Systems with high levels of acoustic noise can generate customer complaints and can influence the a...

Страница 31: ...re 14 shows a typical fan speed curve The actual fan speed can depend on the heatsink but the speed versus temperature ramping should be implemented as shown in the figure Figure 14 Typical Temperatur...

Страница 32: ...ose measurements were 70x15 mm and nominally varied speed from 3000 RPM to 6000 RPM over the temperature range of 32 C to 42 C Lower speeds were investigated for additional reductions in acoustic nois...

Страница 33: ...tsink During heatsink removal this strong adhesive force may cause the processor to be removed from the socket while it is locked and this action may result in damage to the socket or to the processor...

Страница 34: ...Preliminary Information AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 34 AMD Athlon 64 and AMD Opteron Processors Thermal Requirements Chapter 2...

Страница 35: ...thermal reference design solutions 1 and 2 have been presented in this document These thermal solutions should provide the thermal engineer the design information to either implement the thermal refe...

Страница 36: ...Preliminary Information AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 36 Conclusion Chapter 3...

Страница 37: ...hermal conductivity epoxy such as Omega Engineering s Omegabond 101 The heatsink base temperature requires drilling a hole in the heatsink base and inserting a thermocouple inside the hole The ambient...

Страница 38: ...Clean the contact area to achieve good adhesion and apply a small amount of high thermal conductivity epoxy such as Omegabond 101 to glue down the thermocouple bead and about 2 mm of lead wire This st...

Страница 39: ...er 2003 AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide Figure 18 Thermocouple Attached to Processor with Strain Relief on Package and PCB Figure 19 Heatsink with Thermocouple Relief Gro...

Страница 40: ...sert thermocouple into hole until the bead touches the bottom of the hole 4 Tape the thermocouple wire in place to prevent removal and add strain relief A 1 3 Ambient Thermocouple Attachment The ambie...

Страница 41: ...the load cell fixture See Figure 21 for an example of this load cell For more information about the load cell see http www entran com elw htm Figure 21 An Entran ELW D1 Load Cell A 2 1 2 Load Cell Fix...

Страница 42: ...cell fixture should be machined from a stainless steel material A drawing of the fixture is shown in Figure 23 on page 43 The drawing is proportioned for the nominal dimensions of the processor and t...

Страница 43: ...minary Information 26633 Rev 3 03 September 2003 AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide Figure 23 Drawing of Load Cell Fixture for the Entran ELW D1 Load Cell Appendix A Appendi...

Страница 44: ...reas must be followed to avoid tainted load measurements A 2 1 4 Voltage Source A precision voltage source should be used to power the load cell The Entran ELW series load cells require 15 V excitatio...

Страница 45: ...ct the load cell as indicated by the manufacturer 2 With nothing touching the load cell and fixture assembly record the zero load output voltage in millivolts since the load measurement is based on ch...

Страница 46: ...l clip and tighten screws until the clip is fully installed as shown in Figure 25 Figure 25 Heatsink Installation over the Load Cell Fixture 9 Allow the output voltage to settle 1min and take the volt...

Страница 47: ...ction from page 48 through page 57 provide information for the motherboard component keep out areas and height restrictions for the AMD Athlon 64 processor based on the 754 pin socket The ten drawing...

Страница 48: ...Preliminary Information AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide 26633 Rev 3 03 September 2003 48 Appendix Appendix A...

Страница 49: ...Preliminary Information 26633 Rev 3 03 September 2003 AMD Athlon 64 and AMD Opteron Processors Thermal Design Guide Appendix A Appendix 49...

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Страница 68: ...on Processors Thermal Design Guide 26633 Rev 3 03 September 2003 A 4 Thermal Reference Design Solution Component Drawings Pages 69 through 82 contain drawings for the components of the thermal referen...

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