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Intel
®
440GX AGPset Design Guide
3-36
Design Checklist
3.19.2 Design Considerations
•
For UP systems to support both the current Intel
®
Pentium
®
II processor and future
processors, it is highly recommended that storage space for two (or more) BIOS Updates be
provided. This will allow manufacturing flexibility to install either processor, the BIOS should
detect the processor and load the correct BIOS Update.
•
For DP systems, it is recommended that storage for two (or more) BIOS Updates be reserved
for the case where two different steppings of Slot 1 processors are installed. This will allow
both processors to have BIOS Updates applied.
3.20 Thermals / Cooling Solutions
•
For the Intel
®
Pentium
®
II processor, an adequate heat sink and air ventilation must be
provided to ensure that the processor TPLATE specification documented in the datasheet is
met. See the
Intel
®
Pentium
®
II Processor Power Distribution Guideline
s, and
Intel
®
Pentium
®
II Processor Thermal Design Guidelines
for thermal design information.
•
For the Boxed processor, the system must have adequate air ventilation to ensure that the air
intake temperature to the fan/heatsink is less than the maximum allowable fan preheat
temperature (TPH) at the system maximum ambient temperature, measured 0.3” above the
center of the fan. See the
Intel
®
Pentium
®
II Processor
Datasheet for the TPH Specification.
•
Verify that all major components, including the 82443GX can be cooled the way they are
placed. Contact your local Intel Field Sales representative for the following Application Note:
FW82443BX/FW82443GX PCI/AGP Controller Application Note #2: Thermal Design
Considerations. This thermal application note contains thermal specifications, thermal
solutions and the thermal test methodology for the 82443GX component.
3.20.1 Design Considerations
•
Could anything block the air flow to or from the processor card (I/O cards, VRM etc.)?
•
Is there anything between the processor and the air intake that may preheat the air flowing into
the fan/heatsink?
•
If a system fan (other than the power supply fan) is used, have all recirculation paths been
eliminated?
•
What is the air flow through the PSU/system fan?
•
What is the maximum ambient operation temperature of the system?
3.21 Mechanicals
•
For the Intel
®
Pentium
®
II processor: The physical space requirements of the processor must
be met. See the
Intel
®
Pentium
®
II Processor
Datasheet for details.
•
For the Intel
®
Pentium
®
II processor: The physical space requirements of your heat sink must
be met.
•
For the Boxed processor: The physical space requirements of the Boxed Intel
®
Pentium
®
II
Processor processor fan/heatsink must be met. See the
Intel
®
Pentium
®
II Processor
Datasheet
for details.