LGA775 Socket Heatsink Loading
R
Thermal/Mechanical Design Guide 63
Figure 22. Board Deflection Definition
d1
d2
d’1
d’2
A.2.3 Board Deflection Limits
Deflection limits for the ATX/µATX form factor are:
d_BOL – d_ref ≥ 0.09 mm and d_EOL – d_ref ≥ 0.15 mm
And
d’_BOL – d’_ref ≥ 0.09 mm and d_EOL’ – d_ref’ ≥ 0.15 mm
NOTES:
1. The heatsink preload must remain within the static load limits defined in the processor datasheet at all
times.
2. Board deflection should not exceed motherboard manufacturer specifications.
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