Thermal Design Guide for Socket F (1207) Processors

32800 Rev. 3.00 August 2006

Depending on the system features and layout, more space around the socket may be available for the thermal solution than is shown in Figure 8 on page 29. This space permits heat sink designs with better thermal performance.

Appendix C on page 53 shows a complete, detailed set of keep-out drawings for custom 2U-4P systems based on socket F (1207) processors.

5.2Thermal Solution Design Requirements

Table 7 provides the design-target specifications that must be met for socket F (1207) processors to operate reliably in a typical 2U-4P system based on socket F (1207) processors.

Table 7.

Thermal Solution Design Requirements for Custom 2U-4P Systems

 

 

 

 

 

Symbol

Description

Maximum

 

 

 

 

 

L

Length of heat sink

92 mm

 

 

 

 

 

W

Width of heat sink

58 mm

 

 

 

 

 

H

Height of heat sink

40 mm

 

 

 

 

 

θca

Case-to-ambient thermal

0.26°C/W1, 2, 3

 

 

resistance

 

 

MHS

Mass of heat sink

450 g to 700 g

 

Fclip

Clip force

75 lbs ±15 lbs

 

TA

Local ambient temperature near

38°C

 

 

processor

 

 

 

 

 

Notes:

 

 

 

1. This is the thermal resistance required for dual-core, 90-nm socket F (1207) processors. The thermal resistance

requirement may vary depending on the product OPN. The user should consult the processor data sheet for the

thermal requirements specific to the part.

 

2. Heat sinks weighing up to 450 g can be attached to the motherboard. Heat sinks weighing over 450 g should be tied

directly to the chassis for more reliable shock and vibration performance.

 

3. This chapter describes a heat sink weighing less than or equal to 450 g. Design examples of solutions up to 700 g are

in development.

 

 

 

 

 

 

5.3Sample Heat Sinks and Attachment Methods

The following sections provide one possible thermal design solution and the specifics on attaching that solution to the motherboard.

Table 8 on page 31 lists the parts used in the thermal reference design for Custom 2U-4P systems based on socket F (1207) processors.

30

Thermal Design of Custom 2U-4P Systems

Chapter 5

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AMD 1207 manual Thermal Solution Design Requirements