OCPRF100 MP Server System Technical Product Specification

Revision 1.0

ies the fan input voltage. At 28° C ambient temperature, the fan input voltage is 8.0 ± 0.5 Vdc, and at 35° C, the fan input voltage is 13.5 Vdc.

3.3.2.3Cooling Summary

The system fans are sized to provide cooling for up to eight Pentium III Xeon processors. The power supply fans are sized to cool both fully populated SDRAM board sets, two hot-swap hard drives, and for maintaining power supply function under a full load condition. The cooling system is designed using a worst case analysis with no margin under a single fan failure (system or power supply fan) condition. The environmental conditions are summarized in Section Specifica- tions. Figure 3-8: OCPRF100 MP Server System Cooling summarizes the cooling provided to the system components when system and power supply fans are operating with 12 Vdc input. The lower fan speed settings were chosen to meet acoustic and thermal requirements.

 

Fan

Fan

70 CFM (12 Vdc Input)

System

System

70 CFM (12 Vdc Input)

Fan

Fan

System

System

 

70 CFM (12 Vdc Input)

Fan

Fan

System

System

 

150CFM

(Maximum w/ all

power supply fans functioning)

12

CFM/

HDA

Profusion*

Carrier

Pentium (R)

III Xeon (TM)

 

 

Pentium III

 

 

Xeon

 

 

Processor

Memory Carrier

(16 DIMMs)

Midplane

Hot-Swap Hard Drive

Backplane

I/O

 

Carrier

 

PB64

64b PCI Add-in Card

 

 

210 CFM (12

PB64

Vdc)

PB64

 

 

64b PCI Add-in Card

PB64

 

750 W Power Supply

Fan

50 CFM (13.5 Vdc fan

PS

input voltage)

 

 

 

 

 

 

 

 

 

750 W Power Supply

Fan

50 CFM (13.5 Vdc fan

PS

 

input voltage)

 

 

 

 

 

 

750 W Power Supply

Fan

50 CFM (13.5 Vdc fan

PS

input voltage)

 

 

 

 

 

 

Figure 3-8: OCPRF100 MP Server System Cooling

30