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

ATX Thermal/Mechanical Design Information

62 Thermal and Mechanical Design Guidelines

Figure 20. Upward Board Deflection During Shock

The target metal clip nominal stiffness is 540 N/mm [3100 lb/in]. The combined target

for reference clip and fasteners nominal stiffness is 380 N/mm [2180 lb/in]. This is

consistent with the results for the RCBFH-3 design. The nominal preload provided by

the Intel RCFH-4 reference design is 191.3 N ± 44.5 N [43 lb ± 10 lb].

Note: Intel reserves the right to make changes and modifications to the design as necessary

to the Intel RCFH-4 reference design, in particular the clip and fastener.

6.6.2 Mechanical Interface to the Reference Attach Mechanism

The attach mechanism component from the Intel RCFH-4 Reference Design can be

used by other 3

party cooling solutions. The attach mechanism consists of:

• A metal attach clip that interfaces with the heatsink core; see Appendix G,

Figure 78, and Figure 79 for the component drawings.

• Four plastic fasteners; see Appendix G, Figure 80, Figure 81, Figure 82, and

Figure 83 for the component drawings.

Figure 19 shows the reference attach mechanism as part of the Intel RCFH-4

Reference Design. The clip is assembled to heatsink during copper core insertion, and

is meant to be trapped between the core shoulder and the extrusion as shown in

Figure 21. Figure 78 and Figure 79 in Appendix G provides additional details.

Less curvature in region

under stiff clip

Shock Load