Intel Pentium 4 Processor in the 478-Pin Package Thermal Design Guidelines

Intel
®
Pentium
®
4 Processor in the 478-Pin Package Thermal Design Guidelines
R
Design Guide 49
based the reference mechanical components uses a heatsink heavier than 370 g,
the whole platform should be validated against the customer criteria.
The combined center of gravity of the heatsink /fan /shroud assembly must be no
greater than 1.0 inch [25.4 mm] above the top surface of the processor IHS.
Figure 20. Heatsink, Fan, and Shroud Assembly Volumetric Keep-in
NOTE: All dimensions in inches
Figure 21. Clip Bearing Surface. Critical X-Y Dimensions and Position
Gross rectangular MB keepout
footprint
1.250 +/- 0.040
0.200 +/- 0.020
0.600 +/- 0.020
0.250 +/- 0.020
3.80
3.10
Clip bearing
plate surface
area definition
RM mounting holes Gross rectangular MB keepout
footprint
1.250 +/- 0.040
0.200 +/- 0.020
0.600 +/- 0.020
0.250 +/- 0.020
3.80
3.10
Clip bearing
plate surface
area definition
RM mounting holes
NOTE: All dimensions in inches