Intel Core 2 Duo E7300 BX80570E7300 User Manual

Thermal and Mechanical Design Guidelines   

 61 

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. 

7-40, Figure 

7-41, and Figure 

7-42 in 

Appendix G gives detailed reference 

ATX/μATX 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 

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.