Intel E1400 Design Guidelines - Page 64

Safety Requirements, Geometric Envelope for Intel Reference ATX, Thermal Mechanical Design

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ATX Thermal/Mechanical Design Information 6.5 6.6 Safety Requirements Heatsink and attachment assemblies shall be consistent with the manufacture of units that meet the 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 safety feature so that there is no risk of personal injury. Geometric Envelope for Intel Reference ATX Thermal Mechanical Design Figure 7-47, Figure 7-48 and Figure 7-49 in Appendix H gives detailed reference ATX/ 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 6.2.4). 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. 64 Thermal and Mechanical Design Guidelines

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ATX Thermal/Mechanical Design Information
64
Thermal and Mechanical Design Guidelines
6.5
Safety Requirements
Heatsink and attachment assemblies shall be consistent with the manufacture of units
that meet the 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 safety feature so that there is no risk of personal
injury.
6.6
Geometric Envelope for Intel Reference ATX
Thermal Mechanical Design
Figure 7-47, Figure 7-48 and Figure 7-49 in Appendix H gives detailed reference
ATX/
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
. 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 6.2.4). 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.