Intel® Thermal/Mechanical Reference Design Information
R
Thermal/Mechanical Design Guide
45
5.4 Safety
Requirements
Heatsink and attachment assemblies shall be consistent with the manufacture of units that meet
the following safety standards:
•
UL Recognition-approved for flammability at the system level. All mechanical and thermal
enabling components must be a minimum UL94V-2 approved.
•
CSA Certification. All mechanical and thermal enabling components must have CSA
certification.
•
All components (in particular the heatsink fins) must meet the test requirements of UL1439
for sharp edges.
•
If the International Accessibility Probe specified in IEC 950 can access the moving parts of
the fan, consider adding additional safety feature so that there is no risk of personal injury.
5.5
Geometric Envelope for ATX Intel
®
Reference
Thermal Mechanical Design
Figure 45, Figure 46, and Figure 47 in Appendix G provide detailed reference ATX/
μ
ATX
motherboard keep-out information for the reference thermal/mechanical enabling design. These
drawings include height restrictions in the enabling component region.
The maximum height of the reference solution above the motherboard is 71.12 mm [2.8 inches],
and is compliant with the motherboard primary side height constraints defined in the
ATX
Specification revision 2.1
and the
microATX Motherboard Interface Specification revision 1.1
found at
http://www.formfactors.org
. The reference solution requires a chassis obstruction height
of at least 81.28 mm [3.2 inches], measured from the top of the motherboard (refer to
Sections 3.3 and 5.1.4). This allows for appropriate fan inlet airflow to ensure fan performance,
and therefore overall cooling solution performance. This is compliant with the recommendations
found in both
ATX Specification V2.1
and
microATX Motherboard Interface Specification V1.1
documents.
Summary of Contents for 640 - Pentium 4 640 3.2GHz 800MHz 2MB Socket 775 CPU
Page 14: ...Introduction R 14 Thermal Mechanical Design Guide ...
Page 38: ...Thermal Management Logic and Thermal Monitor Feature R 38 Thermal Mechanical Design Guide ...
Page 52: ...Intel Thermal Mechanical Reference Design Information R 52 Thermal Mechanical Design Guide ...
Page 60: ...Acoustic Fan Speed Control R 60 Thermal Mechanical Design Guide ...
Page 72: ...Heatsink Clip Load Metrology R 72 Thermal Mechanical Design Guide ...
Page 99: ...Mechanical Drawings R Thermal Mechanical Design Guide 99 Figure 50 Reference Fastener Sheet 1 ...
Page 103: ...Mechanical Drawings R Thermal Mechanical Design Guide 103 Figure 54 Clip Heatsink Assembly ...
